CRUSTACEA MALACOSTRACA. II. 



69 



conspicuously longer than the second joint; the exopod more than half as long as the proximal joint 

 of the endopod. 



Length of the largest specimen, a female with marsupium from the Sabine Island, is 5'""' long, 

 but the majority of the females are only 3.5 — 4°"". 



Snbadult Male. Antennulse considerably thicker than in the female, five-jointed, the proximal 

 third of the fourth joint being set off by an articulation and somewhat thickened; first joint somewhat 

 shorter than the other joints combined, thick to the end; second joint scarcely as thick as the first 

 and third joint rather thick. Abdomen distinctly a little longer and thicker in proportion to thorax 

 than in the female. — Length 2.6 — 2.7"" 1 '. 



Adult Male. Not seen by me, but I suppose that the adult male described and figured by 

 Sars as belonging to his L. longiremis is the male of L. Sarsii. It has the two proximal joints of the 

 antennulse extremely broad and the chelae uncommonly slender, while the thoracic legs have the sixth 

 joint longer than seventh joint with claw. 



Remarks. L. Sarsii is easily recognized from the other species by the rounded protruding 

 keel or generally triangular process on the lower lateral surface of last abdominal segment and by the 

 row of saw-teeth on the outer side of the chela a little from its posterior margin. In the shape of 

 the hand and the crenulation of the movable finger it agrees wdth L. gracilis Kroyer and L. graciloides 

 Lilljeborg. The form with the obtuse process or rounded lateral keel I name var. obtttsata : it is cer- 

 tainly only a variety, as my material from the Sabine Island contains both specimens with the pro- 

 cesses obtuse or much reduced. That L. Sarsii is identical with L. longiremis G. O. Sars as described 

 and figured in his standard work is easily seen by the pair of processes on last abdominal segment. 

 That the real L. longiremis Lilljeborg is another species is easily decided by two characters found in 

 Lilljeborg's diagnosis of the female: "Manus . . . digito mobili lsevi" and "Unguis pedum thor. 2:di paris 

 brevis, et articulo unguifero multo brevior." This last-named species is described below. 



Occurrence. The "Ingolf" has found this species at three stations. 



North of Iceland: St. 128: Lat. 66° 50' N., Long. 20°02 r W., 194 fin., temp. 0.6°; 1 spec. 



St. 126: Lat. 67° 19' N., Long. i5°52' W., 293 fm., temp. -h 0.5 ; 7 spec. 

 — - — St. 124: Lat. 67°4o' N., Long. i5°4o' W., 495 fm., temp, -j- 0.6° ; 4 spec. 



Besides L. Sarsii has been taken by various Zoologists and the II d Amdrup-Expedition at a 

 good number of localities. 



West-Greenland, probably Egedesminde; 1 spec. (var. obtttsata). Prof. D. Bergendal. 

 Fseroes: Klaksvig, 10 — 15 fm.; about 70 spec. Dr. T Mortensen. 



East Iceland: Breidals Vig, 6 fm., mud and black sand; 28 spec. Dr. A. C. Johansen. 

 Seydis Fjord, 6 fm., black sand; 6 spec. Dr. A. C. Johansen. 

 Bakke Fjord, 8 — 10 fm., black sand; 9 spec. Dr. A. C. Johansen. 

 East Greenland: Augmagsalik, Lat. 65 51' N. ; 4 spec. (var. obtusata). Mag. Kruuse. 



Cape Dalton, Lat. 69° 24.6' N., 9— 11 fm.; 4 spec. Ik 1 Amdrup Exped. 



Turner Sound, Lat. 69 44' N., 3 fm.; 1 spec. [var. obtusata). IF 1 Amdrup Exped. 



North of Stewart Land (about at Lat. 7072 N.), 158 fm.; 2 spec. II 1 ' Amdrup Exped. 



