CRUSTACEA MALACOSTRACA. III. 231 



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 is, 

 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-lateral 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 setae. — 

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



A larval specimen found (by Lutken) on Liparis frigidus is 8 mm. long. 



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

 all situated in the cold area. 



North of the Faeroes: Stat. 141: Lat. ^22' N., Long. 6°58' W., 679 fath., temp. -4 0'6°; 6 spec. 



(5 c?, 1 ?)■ 



— - - Stat. 139: Lat. 63°36' N., Long. 7°3o' W., 702 fath., temp. -=- o-6°; 4 spec. (o*). 

 East of Iceland: Stat. 105: Lat. 65°34' N., Long. 7°3i' W., 762 fath., temp. -^o-8°; 1 spec. (o*). 



Stat. 103 : Lat. 66°23' N., Long. 8°52 r W., 579 fath., temp. -=- o-6° ; 1 spec. (J 1 ). 



— - Stat. 102: Lat. 66°23' N., Long. io°26' W., 750 fath., temp. -=-0-9°; 5 spec. (1 o", 



4 larvae). 

 North of Iceland: Stat. 126: Lat. 6fig' N, Long. i5°52'W., 293 fath., temp. -4-0-5°; 1 spec, (larva). 



— - Stat. 124: Lat. 67°4o' N., Long. i5°4o' W., 495 fath., temp. -fo-6°; i'/ 2 spec. (<$). 



North-East of Iceland: Stat. 120: Lat 67°29' N., Long. n°32' W., 885 fath., temp. -4- ro°; 2 



spec. (cf). 

 — Stat. 119: Lat. 67°53' N., Long. io°i9' W., 1010 fath., temp. -=- ro°; 1 



spec, (larva). 

 South of Jan Mayen: Stat. 117: Lat. 69°i3' N., Long. 8°23' W., 1003 fath., temp, -f- ro°; 2 spec. 



(both larvae, one of them on Liparis frigidus). 

 - — Stat. 113: Lat. 69°3i' N, Long. 7°o6' W., 1309 fath., temp. -=- ro°; 1 spec. 



(larva, taken on Liparis frigidus). 

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

 °5°53' N., Long. 7°i8' W., 1163 fath., temp. -=- ri°, and between Iceland and Jan Mayen: Lat. 6(foz' N.. 

 Long. n°26' W., 1004 fath., temp. -f- ri°. 



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

 situated between Lat. €>3°ij' N., and Lat. 74°54' N. in the sea between Norway, Iceland, Jan Mayen 

 and Beeren Eiland; the depths were from 658 to 1215 fath., the temperatures at the bottom from 



