161 



joint very small and unarmed. Colour greyish white, changing to a rusty 

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



Remarks. This is by far the largest of the known species of the 

 genus, and moreover easily distinguishable 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 

 of the limbs, and I was thereby formerly misled to regard the male as 

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

 H. carinata is nothing but the adult male of H. abyssi. 



Occurrence. Numerous specimens of this pretty species were collected 

 during the Norwegian North Atlantic Expedition in many different Stations, 

 some of which lie close outside the Norwegian coast, for which reason it 

 may perhaps be properly referred to the fauna of Norway. It was however 

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

 fathoms. 



Distribution. - 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, <!. 0. Sars, n. sp. 



(PI. 56, fig. 2). 



Body rather stout, and quite glabrous throughout the whole dorsal 

 face. Cephalon equalling in length the 4 anterior segments of mesosome 

 combined, hood very slightly convex above, and considerably projecting in 

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

 setae. Last pair of epimeral plates of metasome narrowly rounded at the 

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

 produced dorsally. Antenna? unusually slender, basal joint of the superior 

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

 auditory bristles at the end interiorly; penultimate joint of the peduncle in 

 both pairs only provided with 4 plumose setae, nagella rather slender, thai 

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

 also the accessory appendage of the superior, 5-articulate. Grnathopoda of 

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

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

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

 developed. Penultimate pair of pereiopoda shorter than in most uth.-r 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, 



