Murid rodents of the endemic genus Batomys are diverse and geographically widely distributed in the Philippines. Four species have been recognized: B. dentatus and B. granti on Luzon, B. salomonseni on several islands comprising the Mindanao faunal region, and B. russatus on Dinagat Island. A recent survey of small mammals in eastern Mindanao recorded the presence of Batomys on Mt. Hamiguitan, the only other documented occurrence of this genus on Mindanao Island outside of Mt. Kitanglad. Comparison of external morphology as well as cranial and dental features of the Hamiguitan Batomys with available specimens of congeners indicates that although it is closely allied to B. salomonseni, a number of distinct traits separate it from all its congeners, and we describe it as a new species, B. hamiguitan. This species corroborates the hypothesis that the island of Mindanao is comprised of multiple centers of endemism, of which the southeastern highland of Mt. Hamiguitan is one.

Plectranthias nazcae, a new species of anthiine serranid fish, is described from five specimens collected on the Nazca Ridge in the eastern South Pacific, some 1500 kilometers west of Chile, at about 26°S. The new species is distinguished from all other species of Plectranthias by the following combination of characters: total gillrakers on first gill arch 28–31, circum-caudal-peduncular scales 17 or 18, tubed lateral-line scales 36–42, certain body proportions, and apparently coloration. Comments on the coloration of P. exsul and a key to the three known eastern Pacific species of Plectranthias are provided.

Nipponentomon pembertonense is described from Pemberton Historical Park, Maryland. This new species differs from other Nipponentomon spp. in the following combination of characters: 9 anterior setae on abdominal sternite VII, 15 posterior setae on abdominal tergite VIII, cover of tergite VIII gland with posterior row of teeth only, female acrostylus entire and narrowly rounded, foretarsal claw flaps rudimentary and in distal half of claw, foretarsal sensillum c′ reaching base of claw. In several specimens, the ducts and tubes connected to pores on the foretarsus were visible and could be traced at least partially. The most basal pore and the pore at the base of the claw were connected to a common tube complex with a terminal sac. Ducts and tubes also were observed connected to pores near sensillum t3 and just posterior to the empodium.

This paper provides a revised synonymic list for the 13 species belonging to 11 genera of Cicadidae (Hemiptera) from the Korean Peninsula: Platypleura kaempferi (Fabricius, 1794), Suisha coreana (Matsumura, 1927), Lyristes intermedius (Mori, 1931), Cryptotympana atrata (Fabricius, 1775), Graptopsaltria nigrofuscata (De Motschulsky, 1866), Oncotympana fuscata Distant, 1905, Leptosemia takanonis Matsumura, 1917, Meimuna mongolica (Distant, 1881), Meimuna opalifera (Walker, 1850), Cicadetta abscondita Lee, new species, Kosemia admirabilis (Kato, 1927), Kosemia yezoensis (Matsumura, 1898), and Tettigetta isshikii (Kato, 1926). Major changes from preceding lists are: Lyristes japonicus (Kato, 1925) is deleted from the list of Korean Cicadidae considered as having been erroneously recorded due to mislabeling; Euterpnosia inanulata Kishida, 1929 syn. nov. is synonymized with Leptosemia takanonis; the Korean species previously identified as Cicadetta montana (Scopoli, 1772) is described as a new species, Cicadetta abscondita Lee, new species; Cicadetta admirabilis (Kato, 1927) and Cicadetta yezoensis (Matsumura, 1898) are transferred to Kosemia Matsumura, 1927 stat. rev., which is resurrected from junior synonymy with Cicadetta Amyot, 1847, to become Kosemia admirabilis, new combination and Kosemia yezoensis, new combination; Leptopsalta Kato, 1928 syn. nov. is syno

A new species of freshwater crab, Potamonautes subukia, from the forested highlands of western Kenya, East Africa, is described. The small body size at maturity, smooth carapace, and slim outwardly directed first gonopod clearly distinguish this species from all other congeners.

The first zoeal stage of Calocarcinus africanus Calman, 1909 is for the first time described and illustrated from laboratory-hatched material. Its morphology is compared with other trapeziid first stage zoeas, including those described for Quadrella Dana, 1851, Tetralia Dana, 1851 and Trapezia Latreille, 1828. The setation pattern of Calocarcinus does not appear to share the zoeal characters common to these trapeziids, and this may indicate that the genus is erroneously assigned to the Trapeziidae Miers, 1886. A further comparison of Calocarcinus first stage zoeas with other known xanthoid larvae, including those of Eriphia Latreille, 1817, and Lydia Gistel, 1848 was undertaken. Although Calocarcinus first zoeas appear to share many characters with those of Eriphia and Lydia, affinities between these two genera are considered to be speculative at present because many xanthoidean zoeas still remain undescribed. However, the morphology of the first zoea of Calocarcinus does not support the inclusion of this genus in the Trapeziidae. For the present study a data matrix was constructed comprising 12 taxa and twenty-six characters. The resulting tree supported the morphological comparison based on similarity and difference in that Calocarcinus was not a trapezoid but more closely related to the xanthoidean taxon Eriphia.

The female of Enteropsis roscoffensis Chatton & Brément, 1909 (Enteropsinae) is fully redescribed based on a single specimen living in the type ascidian host Dendrodoa grossularia (van Beneden, 1847) collected at the Île de Callot (near Roscoff). The cephalosome has a crown-shaped dorsal cephalic sclerite, which is symmetrical and consists of narrow inner portions (right and left sides not fused medially) and broad outer portions, each with three extensions (1 anterior, 2 posterior). The anus opens as a short longitudinal slit on a rounded protrusion of the dorsal urosome posterior to the genital area. It is thought that these characters are specific for the species. The displacement of the anus (longitudinal slit, variously shaped) to the dorsal side (location varies) of the body is perhaps typical of females of the genus.

The female and male of Mychophilus roseus Hesse, 1865 (Enteropsinae) are fully redescribed based on specimens living in the compound ascidian Botryllus schlosseri (Pallas, 1766) from Roscoff. The female has three submarginal setulose setae on the labrum; the labral setae of M. roseus have not been reported previously. The anus opens as a transverse slit near the dorsal distal margin of the leg 4-bearing segment. The presence of labral setae (number varies) and the displacement of the anus (transverse slit) to the dorsal side (location similar) are probably diagnostic features for females of the genus Mychophilus. With respect to the rostrum and many of the appendages, the male of M. roseus is clearly distinguished from the male of Enterocola fulgens van Beneden (Enterocolinae).

Tubificoides blakei and T. methanicus, both new species of oligochaetes, are described from 2156 and 2170 m depth on the Blake Ridge Diapir, near the intersection of the Carolina Rise and the Blake Ridge, off the continental shelf of North and South Carolina (U.S.A. East Coast). Tubificoides blakei is characterized by the long, parallel teeth of its bifid crotchets, and its mushroom-shaped, cuticular penis sheaths. It appears most closely related to two other deep-water species reported from the northwest Atlantic Ocean, T. bruneli Erséus, 1989 and T. aculeatus (Cook, 1969) but differs from these in the detailed morphology of the penis sheaths. Tubificoides methanicus lacks hair chaetae but is recognized by its numerous bifid chaetae, which have long, somewhat diverging teeth, the upper teeth often being longer than the lower ones, and its smooth, funnel-shaped penis sheaths. It does not seem to be closely related to any other known deep-sea species of Tubificoides, but it resembles the littoral, holarctic, T. pseudogaster (Dahl, 1960), differing from the latter mainly by its greater number and larger size of the posterior chaetae.

A new species of deep-sea gorgonian, Isidella tentaculum, from 720–1050 m depths on Northeast Pacific seamount peaks, continental slopes, and shelf canyons is described and illustrated. The octocoral colonies were observed alive and in situ using a manned submersible and remotely operated vehicles. The new species is a large (up to 132 cm high), abundant, and conspicuous habitat former. It differs from its closest sister species (I. trichotoma, I. longiflora, I. lofotensis, and I. elongata) in size and stature, polyp size, and polyp arrangement. Distinctive characteristics of I. tentaculum include thornstar-shaped sclerites and large, closely-spaced, dimorphic polyps, never before reported in the family Isididae. Living colonies exhibit long basal zooids trailing from the trunk, similar in appearance to scleractinian ‘sweeper tentacles’. Large colonies have long tentacles (∼40 cm). The flabellum has whorls of 4–5 large (6–9 mm high, 2–3 mm diameter), closely packed (2–4 mm apart) autozooid polyps. Long needle-shaped sclerites project from the septa between the pinnate tentacles. Small rod and platelet sclerites are evident in pinnules, and thornstars are evident in the pharynx of the polyps. Thornstars have been reported in Acanella, but not in Isidella.