CRfSTACKA MAI.ACOSTRACA. III. 



it is impossible to decide whether the differences originate from inaccuracies in his figures, or if the 

 specimen figured by him in reality is an animal taken pclagically and belong* to a species allied 

 to that parasitic on Onisimus plauhts. 



Occurrence. The female and male described were found in the mntstipiuin of OMUI'MMI Iru- 

 cofiis G. O. SOTS taken by the "IngolF at the following station. 



North-East of Iceland: StaL 120: Lat 6j^' N., Long. u 32' W., 885 fath., temp. + 10. Further- 

 more the "IngolP captured a larva in second stage at the following place. 



North of the Faroes: StaL 139: Lat. 6336' N, I<ong. fy>' W., 702 fath., temp. -f- cv6. 



At West Greenland Cand. mag. K.. Stcphcnscn captured in Skovfjord a similar larva in a Nan- 

 sen net, 250200 m. 



It may be mentioned here that in the marsupitun of a specimen of Anonyx nugax Phipps 

 captured by Mag. R. Honing in Faskrnds Fjord (East Iceland), 20 50 fath., I found a female cer- 

 tainly belonging to the genus ParafoJascon, but whether it belongs to P. Stfbbingii or to a hitherto 

 unknown species cannot be decided, as the male is wanting, and the female seems to be somewhat 

 misshapen from pressure. 



Distribution. Stebbiug found the male on Onisimus flaulus Kr. from the liarcnts Sea, Lat 

 7030'8"N., Long. 494i'5"E., 52 fath. G. O. Sars states that he found the male on O.flau/us at Bodo, 

 Finmark, furthermore in Plankton taken off the Nordland coast and in the glacial sea north of Siberia. 

 T. Scott recorded the male from gatherings near Cape Flora, Northbrook Island, Franz-Joseph Laud. 



CumoechuS n. gen. 



Adult Female. Nearly globular (PI. XVI, fig. 53). Half or more than half of the breadth 

 of the ventral side occupied by a peculiar longitudinal area stretching itself over nearly the whole length 

 of the surface; the major anterior part of this area is cleft along the middle, the margins of this cleft 

 being the margins of the thorax reaching one another, as the thorax is, as in Clyfieonucus, strongly 

 curved in order to constitute an incubatory cavity. Each half of this thoracic area is at its outer 

 margin raised distinctly above the adjacent surface of the body, and it is divided into six subarcas 

 by impressions or furrows directed from the median cleft outwards and somewhat forwards. The sub- 

 areas increase somewhat in breadth from the first to the third and then decrease less to the sixth. 

 The first subarea shows near the inner margin on the surface a small lobe with the inner margin 

 semicircular and free, and not far from the outer margin of the area originates a leg (/r'K which is four- 

 jointed with the first joint long and somewhat thick, the second considerably thinner and not hall M 

 long as the first, the third as long as the second but much more slender, and the fourth quite small; 

 this appendage is probably second thoracic leg. When all eggs or young have been taken ont of a 

 female, the part in front of second pair of thoracic legs can be examined, and we find quite minute 

 antciintila- (fig. 5 b, a 1 ), a seemingly unpaired lamella (/'), two pairs of lamellae (/',/>) and a pair of 

 appendages which seem to be six-jointed and almost certainly are the first pair of thoracic legs (/r*). 

 The basal joint of these legs is thick, and nearly as long as the other very slender joints combined. 



