CRUSTACEA MALACOSTRACA. IV. 



64. Leptostylis grandis n. sp. 



(PI. IV, fig. 9 a). 



Subadult Male. Carapace rather deep and long, more than twice as long as the dorsal side of 

 the free thoracic segments, with a small number of hairs; seen from the side the outline of the cephalothorax 

 i^ nearly as in the female L. macrura as figured by Sars, but seen from above it is narrower, more oblong- 

 oval ; pseudorostrum is moderately protruding, with the dorsal line horizontal, and the margin below the 

 base is somewhat concave, thus constituting a feeble antennal notch and set with several quadrangular 

 teeth : below and behind this notch the anterior half of the lower margin of the carapace is closely serrated 

 with triangular teeth. Postero-lateral corner of fifth free segment angular, but not produced. Abdomen 

 moderately slender and very long, a little less than half as long again as cephalothorax, as the latter is 3.5 mm. 

 long, while the abdomen with telson is 5 mm. long; fifth segment very long, much longer than the fourth and 

 fully twice as long as the sixth. 



The antennular peduncles consist of three thick joints, but the terminal joint has not obtained the 

 brush of sensory filaments; the flagella in this transition-stage afford scarcely any character. First pair of 

 legs mutilated; second joint below on the distal part with a row of about 8 teeth. Second pair of legs with 

 second joint as long as merus and carpus together; carpus consequently rather elongated, as long as dac- 

 tylus plus half of the propodus. - - Uropods (fig. 9 a) long; peduncle somewhat shorter than the two 

 posterior abdominal segments together, somewhat less than twice as long as the endopod and twice as long 

 as the exopod, with 15 — 16 spines on the inner margin; first joint of the endopod a little shorter than the 

 two other joints together, with 3 — 4 spines on the inner margin; second joint slightly longer than the third, 

 with a single spine; the exopod reaches the middle of third joint of the endopod. Telson nearly twice as 

 long as broad; its terminal spines shorter than usual, only half as long as the breadth of telson; besides 2 

 pairs of lateral spines on the most distal part of telson. 



Length of the subadult male 8.5 mm. 



Remarks. L. grandis is considerably larger than any other species of this genus from the northern 

 hemisphere. In general outline, length of abdomen, existence of teeth on the lower side of second joint of first 

 legs and in relative length of the joints in second legs it is closely allied to L. macrura G. O. S., but it differs 

 in the relative length of the joints in the endopod of the uropods and in the number of spines on the telson. 



Occurrence. Taken by the "Ingolf" at a single very deep station in the warm area. 



Davis Strait: Stat. 36: Lat. 6i°5o' N., Long. 56°2i' W., 1435 fath., temp. 1.5 '; 1 subadult and 1 very 



young male. 



65. Leptostylis ampullacea Lilljeb. 



1856. Cuma ampullacea Lilljeborg, Ofv. K. Sv. Vet.-Akad. Forh. Tolfte Arg., f. 1S55, p. 120. 

 ! i' 100. Leptostylis ampullacea G. O. Sars, Account, III, p. 70, PI. L, fig. 1. 

 1913. Leptostylis ampullaceus Stebbing, Das Tierreich, 39. Lief., p. 124. 



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



North of Iceland: Stat. 127: Lat. 66-33' N., Long. 20°05' \Y., 44 fath., temp. 5. 6°; 1 specimen. 



