CRUSTACEA MALACOSTRACA. II. 75 



the distal half somewhat expanded downwards with its lower margin oblique or distally nearly an- 

 gular. Chela a little longer than the carpus and somewhat more than twice as long as broad, without 

 any serration excepting the four teeth on the distal half of the incisive margin of the movable finger; 

 the anterior margin of the hand considerably longer than the movable finger and its distal part above 

 the insertion of the finger rounded. 



The thoracic legs are rather slender. Second and third pairs similar (fig. 3b); spine on the 

 posterior angle of fourth joint somewhat shorter than fifth joint, which is at least more than twice as 

 long as broad; sixth joint nearly half as long again as the fifth and somewhat or considerably longer 

 than seventh joint with claw. Three posterior pairs with sixth joint as long as or slightly longer 

 than seventh joint with claw (fig. 3c); the row of minute denticles on seventh joint scarcely distinct. 



Five anterior abdominal segments (fig. 3d) with the ventral tubercles high and strong as in 

 L. Hanseni; lateral plates of sixth segment without any expansion or process. Pleopods with their 

 setae very long, about three times as long as the rami. -- Uropods (figs. 3d and 36) somewhat shorter 

 than the two preceding segments combined; peduncle not fully twice as long as deep, conspicuously 

 more than half as long as the first joint of the endopod; the last-named joint from slightly longer to 

 a little shorter than the second joint; exopod distinctly more than half as long as first joint of the 

 endopod. 



Length of a fine female without marsupium 2.9 ram , a female with marsupium is 2.8 mm . (Females 

 with marsupium from Norway vary from 2.4 uim to 3.2 mm in length.) 



Subadult Male. The differences between this animal and the female completely as in 

 L. Hanseni. 



Adult Male. This sex has been described by Lilljeborg, and in the above-named paper I 

 published a couple of analytical figures. I have only seen the single Danish specimen. 



Remarks. In the oblong chelae without any serration L. longiremis agrees with L. Hanseni 

 and differs sharply from the three other preceding species; by having seventh joint with claw of 

 second and third pairs of thoracic legs conspicuously shorter than sixth joint it differs from L. Hanseni, 

 while it is easily separated from L. inermis by the ventral row of well developed tubercles on the 

 five anterior abdominal segments, by much larger difference between the length of the two proximal 

 antennular joints, etc. That this species is the real L. longiremis has been pointed out by me in 

 1910; especially Lilljeborg's above-quoted description in his Latin diagnosis of second pair of legs 

 together with his statement on the chela: "digito mobili Isevi" proves the correctness of my inter- 

 pretation. 



Occurrence. It has been taken by the "Ingolf" at five stations. 



Davis Strait: St. 25: Lat 63 30' N., Long. 54 25' W., 582 fm., temp. 3.3; 17 spec. 



South-West of Iceland: St. 78: Lat. 60 37' N., Long. 27 52' W., 799 fm., temp. 4.5; 8 spec. 



East of Iceland: St. 4: Lat. 64 of N., Long. ni2'W., 237 fm., temp. 2.5; 2 spec. 



North-East of Iceland: St. 120: Lat. 67 29' N., Long. n32'W., 885 fm., temp. -=- 1.0; 4 spec. 



St. 119: Lat 67 53' N., Long. 10 19' W., 1010 fm., temp, -f- 1,0; 6 spec. 



Furthermore it has been taken by the II d Amdrup Expedition at a single locality. 



Jan Mayen, 55 fm.; 2 spec. 



10* 



