﻿CRUSTACEA MALACOSTRACA. II. 



37 



terior margin; it is umisiiall\- large, sliglitly more than half as long as the carapace, somewhat or 

 a little less than twice as broad as long, a little or somewhat shorter than third segment and withont 

 any process below. Third to seventh segments with their lateral margins strongly angular or, in the 

 three posterior segments, very convex, but the angles or the broadest place of the segment is on the 

 third segment situated not much behind the front margin, on the fourth a little more backward.s, on 

 the fifth at the middle, on the si.xth somewhat behind the middle and on the seventli a little before 

 the ijosterior margin. — The legs are rather long and slender; second pair have the si.xth joint (fig. 5b) 

 almost as long as fifth and fourth joints combined and oidy a little longer than seventh joint with 

 claw; the few sette of the legs short. Third pair rather similar to second, but sixth joint is a little 

 shorter and seventh joint with claw ouK- about two-thirds as long as sixth joint; setai short Fourth 

 pair completelv as the third. Se\-entli pair (fig. 5d) slender; second joint almost five times as long 

 as broad; fourth and fifth joints not expanded, with a tooth-shaped spine at the distal posterior angle; 

 sixth ioint somewhat longer than the fifth; seventh joint with claw more than half as long as 

 sixth joint. 



Abdomen scarcely as long as the two preceding segments combined. — Uropods long and 

 slender (figs. 5a and 5e); endopod two-jointed, with first joint somewhat or a little less than twice as 

 long as the second; the exopod reaches the middle of the distal joint of the endopod and seems to be 

 undivided. 



Length of a female with marsupium 1.6'""', of a large female without marsupium 1.85"'™. 



Subadult Male. Differs from the female only in the antennuke, which have the distal part 

 of first joint and the whole .second joint somewhat thicker than in the female, while the third joint 

 has the basal part distinctly thickened on the lower side. 



Remarks. T. irregularis is easily distinguished from all other forms of the genus excepting 

 T. inacroccpliala n. sp. and T. iinitroimfits n. sp. by the shape and relati\-e length and breadth of the 

 thoracic segments; the rather short antennuke, the legs and the uropods afford further characters. It 

 bears some resemblance to 7' inacroccpliala, but the latter species is easily distinguished by its ex- 

 tremely large carapace, the enormous process on the lower side of second thoracic segment, etc. I-"rom 

 T. mucroiiatus it is easily separated b\' the widely different antennce, short settc on the legs, etc. 



Occurrence. The "Ingolf" has taken this fine species at twelve station.s, all in the cold area. 



North of the Fceroes: St. 141 : Lat. 63''22' N., Long. G^sS'W., 679 fm., temp. -4- 0.6°; 22 spec. 

 — - - — St. 139: Lat. 63° 36' N., Long. 7° 30' W., 702 fm., temp. -4- 0.6°; ab. 50 spec. 



East of Iceland: St. 104: Lat. 66''23' N., Long. 7=25' W., 957 fm., temp. -f- i.i"^ i spec. 



— - — St. 103: Lat. 66° 23' N., Long. 8°52'\V., 579 fm., temp. -f- 0.6 ; i spec. 



— - — St. 102: Lat. 66°23'N., Long. 10° 26' W., 750 fm., temp. -^ 0.9"" ; 21 spec. 

 North of Iceland: St. 126: Lat. 67° 19' N., Long. 15^52' W., 293 fm., temp. -^^5"; 2 spec. 



— - — St. 125: Lat. 68° 08' N., Long. 16° 02' W., 729 fm., temp. -^o.S"; 12 spec. 

 North-East of Iceland: St. 120: Lat. 67° 29' N., Long. 11° 32' W.. 8S5 tni., temp. -^ i.o'; 2 .spec. 



— - St. 119: Lat. 67^53' N., Long. lo'uyW., loiofm., temp. -^ i.o'": 2 spec. 



South of Jan .Maycn : St. 118: Lat. 68=27' N., ^-o".?- 8° 20' W., 1060 fm., temp. -M.o°; 6 .spec. 



— - - — St. 117: Lat. 69" 13' N., Long. S'' 23' W., 1003 fm., temp. -M.o"; ab. 40 .spec. 



