CRUSTACEA MALACOSTRACA. III. 



distinctly broader than figured by Sars, while in another specimen the end is very acute, and every 

 intermediate shape is found. Furthermore the sides of the last segment vary from having no lateral 

 denticle to having each one denticle or from two to five or six denticles of various size, and there it, 

 besides, appreciable variation in the breadth of the narrowed part of the segment a little behind the 

 insertion of the uropods. 



Female. It has been figured by Ohlin but not described. My single specimen is only about 

 6-5 mm. long, very thick, blind. Front end of the head slightly produced with the median part of the 

 margin a little convex; each side of the head with a conspicuous subtriangular protuberance. The 

 sides of the two anterior thoracic segments are very distinctly denticulate; the postero-latcral angles 

 of the last pedigerous segment are produced into a distinct, oblong process ; the five anterior abdominal 

 segments with the longitudinal row of triangular teeth placed between the upper surface and the side. 

 Last abdominal segment with a minute, protruding lateral denticle a little from the end, and from 

 that denticle the margins converge strongly to the nearly acute end, which has a couple of seta;. 

 The denticles and processes described afford excellent specific characters for the female sex. 



A larval specimen found (by Liitken) on Ij/wris frigidus is 8 mm. long. 



Occurrence. This large and fine species has been taken by the "Iiigolf at eleven stations, 

 all situated in the cold area. 



North of the Faroes: StaL 141: LaL 63-22' R, Long. 658' W., 679 fath., temp, -f-o-6 ; 6 spec. 



(5 rf, i ?) 



StaL 139: LaL ej^tf N, Long. fy>' W., 702 fath., temp. +06; 4 spec.^). 

 East of Iceland: Stat 105: Lat 6534' N., Long. f$i' W., 762 fath., temp. -5-0-8; i spec (</). 



StaL 103: LaL 6623' N., Long. 852' W., 579 fath., temp. -=-06; : spec. (cf). 



StaL loa : LaL 6623' N., Long. io2o' W., 750 fath., temp. -4- 0-9; 5 spec (i </, 



4 larvae). 



North of Iceland: StaL 126: LaL 67 19' N., Long. i552' W., 293 fath., temp. -5-0-5; i spec, (larva). 

 StaL 124: Lat.674o' N., Long. i54o' W., 495 fath., temp. -^0-6; i'/i spec (<?). 

 North-East of Iceland: StaL 120: LaL 6729' N., Long. n32' W., 885 fath., temp. -f- 1-0; 2 



spec (<ft 

 StaL 119: LaL tfj$$' N., Long. ioi9' W., 1010 fath., temp. -f- it>; i 



spec (larva). 



South of Jan Mayen: StaL 117: LaL og ^' N., Long. 823' W., 1003 fath^ temp. *- it>; 2 spec 



(both larva:, one of them on liparis frig idus\ 



StaL 113: LaL 693i' N., Long. 7o6' W, 1309 fath., temp. -*- it>; i spec 



(larva, taken on Lifaris frig idus\ 

 Furthermore recorded by Sars from two stations within our area, viz. east of Iceland: LaL 



6 553' N-i Long- 7 iff W., 1163 fath., temp. ~- ri, and between Iceland and Jan Mayen: LaL 69*02' N, 



Long. 1 1*26' WT 1004 fath., temp. -f- ri. 



Distribution. G. O. Sars captured G. stygia at five other stations, all in the cold area and 



situated between LaL 63i7' N., and LaL 7454' N. in the sea between Norway, Iceland, Jan Mayen 



and Beercn Eiland; the depths were from 658 to 1215 fath., the temperature* at the bottom from 



