CRUSTACEA MALACOSTRACA. II. 



47 



Chelipeds (fig. 6c) moderately robust. Basal joint with the posterior protuberance somewhat 

 short, posteriorly rounded; its hind margin rather distant from the lower front angle of second thoracic 

 segment. Carpus a little longer than the basal joint and a little more than twice as long as deep, 

 with both margins feebly convex. Chela (fig. 6d) as long as the carpus, a little more than three times 

 as long as broad; movable finger somewhat longer than the anterior margin of the hand; fixed finger 

 much broader than the movable, with about three teeth along the distal part of the incisive margin 

 and the last tooth rectangular and much larger than the two other teeth. 



Thoracic segments (fig. 6 a) differ slightly in breadth; all are subrectangular with the angles 

 a little rounded; the major part of their lateral margins parallel or feebly convex. Second segment 

 conspicuously less than half as long as the third, without any process below. The segments increase 

 in length from the second to the fifth and decrease from the fifth to the seventh, but the fourth seg- 

 ment is slightly longer than the third and slightly shorter than the fifth. The anterior legs moder- 

 ately long and slender. Second pair (fig. 6c) with a very long seta both from the anterior and the 

 posterior distal angle of fifth joint; sixth joint about as long as fifth joint plus half of the fourth, 

 with the distal setae short; seventh joint with claw slightly longer than sixth joint. Third pair some- 

 what shorter than second; fourth joint with a long seta from the distal posterior angle, fifth joint with 

 a very long seta both from the anterior and the posterior distal angle; sixth joint somewhat longer 

 than fifth, with short setse; seventh joint with claw distinctly more than half as long as sixth joint. 

 Sixth and seventh pairs (fig. 6e) with the second joint somewhat widened, two and a half times as long 

 as broad; fourth joint feebly tapering and with a short spine at the distal anterior angle (fig. 6f); 

 fifth joint moderately broad, slightly broader towards the end and with a small, low, glabrous pro- 

 tuberance just before the end of the anterior margin and a minute spine at the end; sixth joint only 

 a little longer than the fifth, very moderately slender, with a spine near the distal anterior angle; 

 seventh joint with claw about half as long as sixth joint. 



Abdomen somewhat longer than and as broad as the two preceding segments combined. - 

 Uropods somewhat short; endopod (fig. bg) two-jointed, with first joint slightly longer than the 

 second; exopod slightly or a little longer than the proximal joint of the endopod. 



Length of females without marsupium 2.3 mm ; females with marsupium unknown. 



Immature Male. Differs from the female in the antennulse, which are thickened as in the 

 young male of T. mucronalus. 



Remarks. This species is allied to T. penicillatus, but it is somewhat larger, a little more 

 slender and differs in the shape of the carapace, in having seventh joint with claw of second and third 

 pairs of legs much longer in proportion to the sixth joint, in possessing long or very long setse on 

 fifth joint of these legs, in having the exopod of the tiropods considerably shorter and unjointed, 

 and no ventral process, on second thoracic segment. T. penicillatus is a warm water species, while 

 T. inermis is known only from the cold area, with the temperature below zero. 



Occurrence. This species has been taken by the "Ingolf" at four stations. 



North of the Faeroes: St 141: Lat. 63 22' N., Long. 6 58' W., 679 fm., temp. -4- 0.6 ; i spec. 

 - - St. 138: Lat6326'N., Long. 7 56' W., 471 fm., temp. -=- 0.6 ; i spec. 



