43 



aimmiiiate. Coxal plates veiy large and cIosp. tngetlier, the infpvidr edgps of 

 the 4 anterior pairs fdrmiiig on eacli side an niiiiiterrn])ted arcli, 4tli pair the 

 largest and nearly three times as deep as the body, deeply eniarginated jxi- 

 stei'iorly, the lower part' considerably dilated and forming posteriorly a sharp 

 corner; 5th pair abont as deep as broad. Last pair of epimeral ])lates of 

 metasome prodneed at the jiosterior eonei- to a shar]i n])tnrned liooklihc pro- 

 jection. Eyes large, In'oadly renifoi'm, pigment dark jnirplish. Superior 

 antennte almost the lengtli of tlie ceplialon and the 2 anterior segments of 

 the mesosome combined, 1st joint of peduncle rather broad, witli a row of small 

 delicately ciliated bristles on tlie posterior edge, tlie 2 succeeding joints con- 

 siderably' narrower and roml)ined aliout as long as tlie 1st; flagellum slender, 

 aboiTt the length of the peduncle, r2-articu]ate; accessory appendage very 

 small, triarticulate. Inferior antennge in female scarcely lf)nger than the superior, 

 3rd joint of the peduncle nnusuallj' large, flagellum .sliorter tlmn the peduncle; 

 in male greatly elongated, exceeding the length of tlie body, flagellum very 

 narrow, filiform. Anterior gnatlio[)oda unusually sliort, basal joint as long as 

 the whole remainder part of tlie leg, propodos narrow, tapering, a little longer 

 than the carpus. Pereiopoda densely setous, the sefje in female simple, in 

 male plumose, carpal and propodal joint, as well as the dactylus, in all \evy 

 slender. Last pair of uropoda with the rami scarcely as long as the basal 

 part. Telson oval, unarmed, evenly rounded posteriorly. Colour pale 

 yellowish, with irregular orange shades on the 4 po.sterior pairs of coxal 

 plates and the posterior segments of the body. Length 12 mm. 



Bfinarls. — It appears to me somewhat doubtful whether the present 

 form is identical with the species so named by Milne Edwards. But as Sp. 

 Bate has identified the British form, which unquestionably is the same as 

 that here described, with Milne Edwards' species, I think the name proposed l)y 

 the latter author must be retained for the present foi'm. 



Occitrmicc. — The species would seem to have a similar distribution 

 on tlie coast of Norway as Ichno^ms .^iphiicornis, having been met with only 

 o the west coast: at Cliristiansund, Sognefjord, Bukken, Mosterhavn, Hauge- 

 sund. It occurs in rather deep water, from 50 to 100 fathoms. 



Disfrili/tUmi. — British Islands, France, Mediterranean. 



Gen. 8. Socarnes, ?,oeck, ISTO. 



Body less compressed, with ratlier large coxal plates. Antenuie about 

 as in Lysianassa, saving tliat the accessory apjiendage of the sirperior ones 

 is more developed. Oral parts very like those in the said genus, Init the 



