161 



jciiiit vfvy small and unarmed. (!(d(iiir greyish white, changing to a rusty 

 yellow. Length of adult female 12 mm, of male aliout the same. 



BcDiarks. — This is by far the largest of the known species of the 

 genus, and moreover easily di.stingnishable by the peculiar form of the basal joint 

 of the last pair of pereiopoda. As with other species, the sexual differences 

 are very striking, both as to the outer appearance, and in the structure of some 

 iif the limlis, and I was thereby formei-ly misled to regard the male as 

 belonging to a distinct species. I have however now convinced myself that 

 H. carinatd is nothing but the adult male of H. ahysifti. 



Orcurrence. — Numerous specimens of this })retty spe(aes were collected 

 iluring the Norwegian North Atlantic Expedition in mau^- different Stations, 

 some of which lie close outside the Noi'wegian coast, for which I'cason it 

 ma}' perhaps be properly refei'red to the fauna of Norwa\-. It was however 

 always met with only in cfinsiderable depths, varying from 350 to 1215 

 fathoms. 



Disfrihution. — Outside the great fishing banks from the 63rd to the 

 75th degree of latitude, and extending westwards to the sea between Iceland 

 and Jan Mayen. 



13. Harpinia laevis, (t. (). Sars, n. sp. 



(PI. 56, fig. 2). 



Body rather stout, and i|uite glaln-ous throughout the whole dorsal 

 face. Cephalon equalling in length the 4 antei-ioi' segments of mesosome 

 combined, hood very slightly couA-ex above, and considerabl}' projecting in 

 front. Anterior pairs of coxal plates rathei' large, each with only 3 marginal 

 setae. Last pair of epimeral plates of metasome naiTowly I'ounded at the 

 lateral corners, inferior edge quite smooth. First segment of urosome not 

 produced dorsally. Antennae unusually slender, basal joint of the superior 

 ones less dilated than in most other species, and having imly 2 penicillate 

 auditor}^ bristles at the end inferiorly; penultimate joint of the peduncle in 

 both pairs only provided with 4 plumose setae, Hagella rather slender, that 

 of the superior composed of 6 articulations, fiagellum of the inferior ones, as 

 also the accessory appendage of the superior, 5-articulate. (Jnathopoda of 

 moderate size, the posterior ones somewhat more powerful than the anterior, 

 hand in both pairs oblong oval, with the palmar edge rather oljlique, though 

 scarcely exceeding in length the hind margin, thundj-like projection well 

 developed. Penultimate pair of pereiopoda shorter than in most other species 

 and considerably less than half the length of the body; basal joint of last 

 pair rather large, posterior expansion obliquely rounded, so as to reach beyond 



21 — Crustacea. 



