﻿CKUSTACKA MALACOSTkACA. 11. 



89 



proximal tliird coiisidcralilx' tliickeiiL-d (Idwiiwards. vSccond joint nmcli produced abo\-e, \-ery lousr, 

 ha\'inii' the upper niar^^iu distincllx more tliaii iialf as lou<; as that of the first joint, sonicwliat longer 

 tlian the two distal joints eoudnued and more than twice as lon>; as the depth of the joint; third 

 joint extrenieh' short; fourth joint considerabh- shorter than the second which is about as long as the 

 terminal seta-. Antenn;e somewhat short; fourth and fifth joints completely fused, together conspic- 

 ously less than twice as long as sixth joint. 



Chelipeds ifig. i b) moderately robust. The basal joint is a little shorter than the carpus, its 

 posterior jirocess long, almost twice as long as deep with tlie entl somewhat distant from the front 

 lower end of second thoracic segment. Carpus a little less than twice as long as deep, with each of 

 the two halves of the lower margin somewhat feebh- convex. Chela a little longer than the carpus, 

 a little more than twice as long as broad, presenting a somewhat ])eenliar aspect, because the posterior 

 margin is conspicuously convex; no protruding angle abo\'e the insertion of the moval)le finger, and 

 this finger is considerably shorter than the anterior margin of the hand and rather broad towards the 

 base; the fixed finger has an acute tooth near the end of the iucisi\-e margin. 



Second and third pairs of thoracic legs (fig. ib) soinewdiat robust; fourth joint with the posterior 

 spiue rather h'Ug; fifth joint a little shorter than the fourth, with the distal anterior spine long and 

 much longer than the posterior; sixth joint not fulh' twice as long as the fifth and distincth' longer 

 than seventh joint with its claw. — Tliree posterior pairs of legs moderately robust (fig. le); the s])ines 

 on fifth and sixth joints long; sixth joint somewhat shorter than se\-enth with its straight claw. 



Abdomen as long as the two preceding segments combined; the sixth segment (figs, id and lel 

 a little longer than the sum of the three preceding segments, thus a little longer than in the other 

 species of this genus; this segment is somewhat produced behind, so that the uropods are inserted at, 

 or even .slightly before, the middle of its lateral margins, an arrangement producing a pecidiar aspect. 

 The lower margin of each of the five anterior segments either somewhat convex or even showing a 

 somewhat low protuberance. — Uropods strong and considerably shorter than the si.xth segment, 

 reaching somewhat be\-oud the end of abdomen; pedinicle much deeper than long; first joint of the 

 endopod only half as long as the second, but yet a good deal longer than the small, one-jointed exopod. 



Ivength of the largest specimen 1.7'""'. 



Remarks. This species is easily recognized by the terminal part of the abdomen with its 

 last segment produced posteriorly and the characteristic uropods originating at the middle of the 

 lateral margins of the segments; the shape of the body, the auteuunhe, the chelipeds afford further 

 characters. — Mouth-parts unknown. 



C)cctirrence. It has been taken In the "Ingolf" at a single station. 



Davis vStrait: vSt. 24: Lat. 63"\)6' N., Long. 56'\)()' W'., ii>)c) fm., temp, ■>..['; 3 spec. 



57. Leptognathia ventralis n. sp, 



(PI. VIII, fig.s. 7a-7k.) 



Female. I'.od\' slender (fig. 7a), about se\en times as long as broad, decreasing somewhat in 

 breadth from the carapace to the end of abdomen. - Carapace as long as, or even .sliglulv longer 



The Iii"..lf.|N|.c,liil...i III, J. '2 



