﻿CRUSTAClvV MALACOSTRACA. II. jgiC 



or somewhat rounded angles and hotii ends of each segment are straiglit. Third, fourth, fiftli and 

 sixth segments subequal in length, while sec(md and se\enth segments are somewhat shorter. Xo 

 ventral processes are found. — Thoracic legs (figs. 4b and 40 moderatel\- short, and all subequal in 

 length and moderately slender; the relative length of the joint almost as in /'. ii/sigms, but the spines 

 on the anterior pairs are much shorter than in that species. 



Abdomen very short (fig. 4a). Five anterior segments coml^ined scarcely as long as and con- 

 siderably narrower than seventh thoracic segment (fig. 4di. Si.xth segment about as long as the four 

 preceding segments combined and somewhat broader than the fifth .segment: each half of its posterior 

 margin is considerably concave, as the median third of the segment is produced backwards in a 

 triangle with the end nearh' acute. — Uropods robust and somewhat shoiter than the si.xth segment; 

 the peduncle longer than deep (fig. 4c), with the outer distal angle a little produced as a small rudi- 

 ment of an exopod not marked off; the endopod unjointed, slighth- longer than the peduncle. 



Length of the largest specimen 1.9™'". 



Remarks. P.stthfilis is easil\' distinguished from all other Tanaidje with four-jointed anten- 

 nuke described in this jjaper b\ its uropods. The antennuhc are unusualh thick and shaped as in 

 subadnlt males of allied forms, but as no pleopods are found the s]iecimens must be females. 



Occurrence. Taken by the "Ingolf at a single station. 



Davis Strait: St. 32: Lat. 66°35' N., Long. 56° 38' W., 318 fm., temp. 3.9 ; 7 spec. 



78. Paranarthrura clavipes n. sp. 



(PL xn, fig.s. 5 a— 5 c.) 



Immature i\Lile and juvenile vSpecimen. Body, seen from abo\e (fig. 5ai, moderatel\' 

 slender, broadest across the carapace and tapering much backwards to the abdomen. - Carapace large 

 (fig. 5a), somewhat shorter than the two following segments combined — which are unconnnonl\" 

 lonsf — , somewhat longer than broad and broadest a little before the middle, which is nearh more 

 than twice as broad as the front end, and consequenth' the lateral margins are \ery con\ex. 



Anteniiuke (fig. 5b) much shorter than the carapace. First joint a little longer than the three 

 other joints combined and in the immature male twt) and a half times as long as dee]); second joint 

 somewhat produced above and not half as long as the first joint; third joint quite short; fourth joint 

 considerabh' shorter than the second. Anteiuue of moderate length; the joint conqiosed by the 



fusion of fourth and fifth joints is vcr\' long, while the penultimate joint is unusuallv short. 



Chelipeds (fig. 5 b) moderateh' strong. The basal joint is considerably longer than deei>, 

 posteriorly produced in a protuberance which is narrowh' rounded behind, and the distance l)etween 

 its end and the front lower angle of second thoracic segment is a little more than half as long as the 

 joint itself. Carpus slightK- more than half as long again as the basal joint, .somewhat more than 

 twice as long as deep, with the upper basal part somewhat jModuced backwards; most of the upper 

 margin and nearl\ the whole free lower margin are straight and sliglulx cmnerging. Chela slighth' 

 longer than the carpus, almost two and a half times as long as broad, regularl\- shajied with the 

 fingers acute; the posterior margin almost straight with a single seta; the movable finger slighth 

 shorter than tlu- anterior niarsjiu oi the jiand. 



