99 



of the last pair verv large, oval, fully as long as tlie remainder part of tlie 

 leg. Last pair of nropoda witli the rami very narrow, niucroniform, and 

 without any marginal setae, the outer one being the longer and having the 

 terminal joint spinifoi'm. Telson not nearly twice as long as broad, with 

 1 or 2 pairs of dorsal denticles, cleft extending neaidy to the base. Body 

 pellucid whiti.sh, without any pigmentation. Length of female 5 mm. 



Jiema)l-8. — I at first believed this little form to belong to tlie fidlow- 

 ing genus. Having, however, made out its anatomy in detail, I find it to 

 be a true HopJony.r, though differing in some j)oints, especially as to tlie 

 structure of the last pair of uropoda and the absolnte want of eyes, rather 

 markedly from the other species. 



Occurrence. — I have as yet only met with 2 specimens of this small 

 species, both being collected in tlie same jdace, viz., at Lexvigen, Trond- 

 hjemsfjord, from a depth of nearly 150 fathoms. 



Gen. 24. Centromedon, (i. O. Sars, n. 

 Syn: Anonyx, Lilljeborg (ex parte). 



Body, as a rule, sliort and stout, with rather deep coxal plates. 

 Lateral corners of cephalon acutely produced, as also those of the last jiair 

 of epimeral plates of metasome. Eyes imperfectly developed or quite want- 

 ing. Antennae (in female) rather stout and subequal in length. Epistome 

 not at all projecting. Anterior lip large and broadly rounded. Mandibles 

 of moderate size, molar expansion eonico-attenuated, palp rather large and 

 originating much nearer the tip than does the latter. First pair of maxillae 

 witli the terminal joint of the palp scarcely expanded at the tip and only 

 armed with a restricted number of spines ; 2nd pair with the inner lobe more 

 ehmgate than in the 2 preceding genera, though a little shorter than the 

 outer. Maxillipeds less strong, masticatory lobe oblong oval, not reaching to 

 the end of the antepenultimate joint of the palp; the latter having the tei'- 

 minal joint comparatively small and scarcely claw-like. Anterior gnathopoda 

 rather stout, imperfectly subcheliform ; the propodos obpj-riform, without 

 auA- distinctly defined jjalmar edge; dactylus of moderate length and sini])le. 

 Po-sterior gnathopoda more slender than the anterior, propodos tran.sversely 

 truncated at the lip, dactylus small. Pereio])oda moderatelv slender, basal 



