28 CRUSTACEA MALACOSTRACA. II. 



The chelse (fig. 5 c) are somewhat less than three times as long as broad, with the posterior 

 margin very moderately concave, shaped in the main as in the female, but the fingers are conspi- 

 cuously shorter in proportion to the hand; the movable finger is thicker and the fixed finger near 

 the base less thick than in the male P. forcipatus. 



The thoracic legs as in the male P. forcipatus conspicuously more slender than in the female 

 and as in that species showing other differences, but besides affording specific characters. Second 

 pair (fig. 5 c) with seventh joint plus claw more than half as long again as sixth joint. Third and 

 fourth pairs with the short spur rather slender, while seventh joint with claw is as long as sixth 

 joint. Three posterior pairs of legs (figs. 5 e and 5 f) with the spur short and rather slender; seventh 

 joint with claw only a little shorter than sixth joint, and the claw itself only half as long as 

 seventh joint. 



The five anterior abdominal segments, seen from above (fig. 5 d), with the lateral margins of 

 each segment very convex, so that the entire lateral margin of this part of the abdomen has five 

 deep incisions, while in the male P. forcipatus this margin shows no such incisions. Sixth segment 

 posteriorly somewhat produced, but much less than in P. forcipatus, and has at the middle of the 

 hind margin a somewhat small, angular emargination. The highly developed pleopods with some 

 of the setae more than twice as long the rami. The uropods in the main similar to those in the 

 female, but the rami a little longer. 



Length of the single male 1.8 mm . 



Occurrence. The "Ingolf" has captured this species at seven localities. 



West Iceland: St. 86: Lat 65 03' N., Long. 23 47.6' W., 76 fm.; i spec. 



East of Iceland: St. 4: Lat. 64 07' N., Long. 11 12' W., 237 fm., temp. 2.5; 3 spec. 

 St. 58: Lat. 64 25' N., Long. 12 09' W., 211 fm., temp. 0.8; 14 spec. 



East Iceland: Seydis Fjord, 2050 fm. ; 5 spec. 



North of Iceland: St 128: Lat. 66 30' N., Long. 20 02' W., 194 fm., temp. 0-6; 4 spec. 



St 126: Lat 67 19' N., Long. 15 52' W., 293 fm., temp. -4- 0.5; 5 spec. 



Jan Mayen: St. 115: Lat 70 50' N., Long. 8 29' W., 86 fm., temp. 0.1; 10 spec. 



P. Lilljeborgii has besides been taken by other expeditions at six localities situated in very 

 different parts of our area. 



West Greenland: Karajok Fjord, ab. Lat. 70 20' N. ; several spec. Vanhoffen. 



East Iceland: Nord Fjord, 40 fm.; 5 spec. Mag. sc. R. Horring. 



East Greenland: Angmasivik, at Lat. 65 51' N.; i spec. Mag. sc. Kruuse. 



Cape Dalton, Lat. 69 24' N., 9 u fm; 2 spec. (. and adult c?). II' 1 Amdrup Exp. 

 Denmark Isl , Lat. 7o27' N., Long. 26 12' W. 4 5 fm., muddy bottom; i spec. 



Ryder Exp. 

 i s,pec. Ryder Exp. 



Jan Mayen: 55 fm. ; i spec. II d Amdrup Exp. 



Distribution. Outside our area hitherto known from Varanger Fjord at Vadso (ab. Lat. 

 7oio'N. in East Finmark), "in a depth of 100 120 fathoms" (G. O. Sars); recently it has been taken 

 in the Barents Sea, Lat. 76 26' N., Long. 6o55' E., vertical pelagic haul from 30 to o meters (Stappers). 



