jQQ CRUSTACEA MALACOSTRACA. II. 



AnteiiimlEe scarcely or a little shorter than the carapace (fig. ib), moderately robust. First joint 

 only a little longer than second and third joints combined, about twice as long as deep; second joint 

 a little more than half as long as the first and a little produced above; third joint moderately long, 

 with its lower margin as long as that of second joint; fourth joint almost as long as the second. — 

 Antennae with fourth and fifth joints completely fused. 



Chelipeds (figs, i b and i c) moderately strong. Basal joint short, with its entire posterior 

 margin very oblique and attached to the lower part of the side of cephalothorax nearly at its middle, 

 thus very far from the lower front angle of second thoracic segment. Carpus half as long again as 

 deep, somewhat triangular in aspect, with its postero-inferior margin long; the anterior margin 

 uncommonly short. Chela not longer than the carpus, somewhat curved, almost two and a half times 

 as long as broad with the posterior margin of the hand considerably concave; movable finger as long 

 as the anterior margin of the hand, moderately broad; fixed finger with its posterior margin straight 

 and with a single seta towards its base; this finger is somewhat broader than the movable and 

 decreases gradually in breadth from the base to somewhat from the end, where a conspicuous, triang- 

 ular tooth projects on the incisive margin, while the distal portion of the finger beyond that tooth is 

 slender, straight and projects conspicuously when the fingers are closed; the movable finger has a 

 long and strong sub-spiniform seta projecting from the inner side somewhat from the base; furthermore 

 a long seta and two shorter setae originate from the inner surface of the hand at the base of the 

 fixed finger; when the fingers are closed no interval is found between their proximal halves. 



Thoracic segments with their lateral margins considerably convex (fig. la); second segment 

 somewhat shorter than the third. — Second to fourth pairs of thoracic legs (fig. i b) moderately strong, 

 subsimilar in shape but decreasing considerably in length from second to fourth pairs; second pair 

 (fig. I d) with fourth and fifth joints subequal in length and their terminal setae short; sixth joint 

 somewhat longer than the fifth and as long as seventh joint with claw. Three posterior pairs (fig. le) 

 somewhat short and robust with their spines rather short; seventh joint short and the claw very short; 

 both together much shorter than sixth joint. 



Abdomen somewhat longer than the two preceding segments combined (fig. i a). Ventral 

 margin of each of the five anterior segments somewhat convex. Pleopods somewhat large (fig. ig); 

 both rami with a good number of plumose setae (fig. if) and many of them long; the setae are found 

 on the exopod along the whole, on the endopod along the distal half, of the outer margin. Sixth 

 segment as long as the two preceding segments combined. — Uropods somewhat sTiorter than sixth 

 segment; peduncle broad but distinctly longer than deep, with its lower produced part almost as long 

 as the upper margin of the peduncle and terminating in a long seta and two short setae (fig. ih); the 

 endopod moderately robust, two-jointed, but the articulation is not very distinct; the second joint 

 scarcely as long as the first and with a dorsal seta at the middle. 



Length 2.2 """. 



Remarks. L. prqfimda differs from all preceding species of the genus by the characters enumer- 

 ated for the group. Its differences from L. latiremis n. sp. are pointed out in the "Remarks" on this species. 



Occurrence. It has been taken by the "Ingolf" at a single deep-sea station. 



South-West of Cape Farewell: St. 22: Lat. 58" 10' N., Long. 48=25' W., 1845 fm., temp. 1.4°; 3 spec. 



