117 



slender and elongated, nnrrow lanceolate in form, and strongly constricted at the 

 base, lateral edges slightly curved, and each armed in the middle with 4 short 

 denticles, tip acutely produced. Superior antennae not quite half the length of 

 the body, 1st joint of the peduncle exceeding in length the other 2 combined, 

 and clothed with very strong, scattered bristles, 2nd joint very small, 3rd linear, 

 flagellum nearly as long as the peduncle, and composed of 10 articulations, the 

 outermost of which carry delicate olfactory filaments. Inferior antennse about twice 

 the length of the superior, the 2 outer joints of the peduncle slender and elon- 

 gated, flagellum shorter than the last peduncular joint, and composed of about 

 16 articulations. 1st pair of legs rather small, carpus scarcely at all dilated, 

 propodos about as long as the carpus, and oblong fusiform, with a few spines 

 inside. The other legs very slender, and clothed with scattered spiniform bristles; 

 last pair nearly equalling the body in length, and having the propodal joint ex- 

 tremely slender and elongated; dactylus in all pairs simple, conically tapered. 

 Female operculum narrow lanceolate, with 2 apical setre; middle piece of male 

 opcrculum not expanded distally. Uropoda issuing close together from 2 juxta- 

 posed obtuse prominences of the dorsal face of the caudal segment, and consider- 

 ably exceeding it in length, basal part long and narrow, outer ramus small and 

 turned inwards, inner ramus very much elongated, linear, and, like the basal 

 part, edged with scattered, slender bristles. Colour whitish grey. Length of ad- 

 ult female 2 mm. 



Remarks. This is as yet the only known species of the genus, and is 

 easily recognizbale from any of our other Isopoda, exhibiting, indeed, a very 

 bizarre appearance. The exact length of the uropoda cannot be stated, as in 

 the solitary specimen possessing them, the outer part of the inner ramus was 

 broken off. On the whole, all the appendages are extremely brittle, and, indeed, 

 in none of the specimens examined, were they preserved in an entire state. 



Occurrence. The only place where I have met with this peculiar form, 

 is in the outer part of the Hardanger Fjord, at Mosterhavn, where a few speci- 

 mens were detected on a close examination of a quantity of sandy clay taken up 

 by the, aid of the dredge from a depth of 150 fathoms. Out of Norway, this 

 form has not yet been recorded. 



