354 



by its small size, comparatively compact form of Ijody, and especially by tlie 

 unusiially short antennae. The gnathopoda also exhibit a more powerful 

 structure than in most of the species of this genns. 



Occurrence. — I first detected this form in the Varangerfjord, at Vadso, 

 whei-e a few specimens were collected from a depth of 20 — 30 fathoms. Sub- 

 sequently I have also found it off West Finmark, at Hammerfest, but farther 

 south it has never been met with by me. Out o'f Norway it has not yet 

 been recorded. 



Gen. 3. Stenopleustes, G. O. Sars, n. 

 Syn.: Aniphithopsis, Boeck fpart ) 



Body slender and compressed, with very tliin and pellucid integu- 

 ments, and the back not carinated. Cephalon produced in front to a slight 

 rostral projection, postantennal corners but little prod\;ced. Coxal plates not 

 very large. Superior antennse very elender and much longer than the inferior. 

 Anterior and posterior lips nearly "as in Faramphitho'e. Mandibles, on the 

 other liand, liaving tlie molar expansion well-developed, compressed, and 

 densely hair3' at the transverseh^- truncated extremity, palp of moderate size. 

 First pair of maxillse conipai'atively shorter and stouter than in the preceding 

 genus, with the palp not expanded distally, and the basal lobe only provided 

 with a single plumose seta. Maxillipeds with the basal lobes rather broad, masti- 

 catory lobes comparatively small and liaving only a few slender hairs on the 

 inner edge, palp less elongated than in Farampliifhoc, its last joint conically 

 produced in front of the insertion of the dactylus. Gnathopoda comparatively 

 feeble in structure, carpus elongated and but slightly expanded below, pro- 

 podos rather narrow and imperfectly subclieliform. Pereioj)oda slender and 

 elongated. Uropoda and telson nearly as in the preceding genus. 



Eemarls. — The present new genus is nearl}^ allied to Parampliintoc, 

 diifering however very markedly- in the structure of the mandibles, of which 

 the molar expansion, unlike that in tlie above genus, is well developed and 

 of a [)eculiar, compressed form. Also in the structure of the 1st pair of 

 maxillae and tliat of the maxillipeds we find some dilferences from those in 

 the preceding genus. The 2 species described in the sequel, the only ones as 

 yet known, perfectly agree in all essential characteristics, though being, 

 specifically, ])retty well defined. 



