﻿CRUSTACEA MALACO.STRACA. U. j. 



the distal half somewhat expanded downwards with its lower niar(,nn ohli(|ne or dislallv nearlv aii- 

 i^ular. Chela a little longer than the car]>iis and somewhat more than twice as lon<j as broad, without 

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

 the anterior margin of the hand considerabh- longer than the movalile 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 tlie 

 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 considerablv longer 

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

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



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

 J.. H(ii/.u-i/i\ lateral plates of sixth segment without an\- expansion or process. Pleopods with their 

 setas very long, about three times as long as the rami. — Uropods (figs. 3d and 3e) 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 distincth' more than half as long as first joint of the 

 endopod. 



Length of a fine feuude without marsupium 2.9""", a female with marsupiuni is 2.8'""'. (Females 

 with nuirsuijium from Norwav var\- from 2.4""" to 3.2""" in length.) 



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

 A. Haiiseiii. 



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

 published a couple of anal\tical figures. I have only seen the single Danish specimen. 



Remarks. In the oblong cheke without any serration L. loiniirriiiis agrees with L.TIanseni 

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

 second and third pairs of thoracic legs conspicuously shorter than sixth joint it differs from J.. Haiisrm\ 

 while it is easily separated from /.. iihriiiis by the ventral row of well developed tubercles on tlie 

 five anterior abdomiiud segments, b\- much larger difference between the length of the two proximal 

 antennular joints, etc. That this species is the real A. /(>//i;/rci//is has been pointed out b\- me in 

 1910; especially Lilljehorg's above-quoted description in his Latin diagnosis of seci)nd pair of legs 

 together with his statement on the chela: "digito mobili kevi" proves the correctness of m\- inter- 

 pretation. 



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



Davis Strait: St. 25: Lat. 63" 30' N., Long. 54° 25' \V., 5X2 fm., temp. y^°\ 17 spec. 



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



East of Iceland: ,St. 4: Lat. 64'^ 07' N., Long. ii"i2'\V., 237 fm., temp. 2.5"; 2 spec. 



North-East of Iceland: St. 120: Lat. 67° 29' N., Long. ii°32'W., 8S5 fm., temp. ~ 1.0- ; 4 spec. 

 — - — .St. 119: Lat. 67 ' 53' N., Long. lo'ig'W., loio fm., temp. -=r 1,0'"; 6 spec. 



Furthermore it has been taken by the 11' Amdrup Expedition at a single locality. 



Jan Maxen, 55 fm.; 2 spec. 



io» 



