88 CRUSTACEA MALACOSTRACA. II. 



margin of the five anterior segments (figs. 6d and 6e) a little convex. The pleopods generally wanting; 

 in a single specimen (from Stat. 4) which seems to be a female without marsupinm, I found rudi- 

 mentary pleopods (fig. 6e), each pleopod being a minute, a little oval plate. The uropods moder- 

 ately long, distinctly shorter than the two posterior segments combined; the peduncle a little longer 

 than deep, considerably or much shorter than the first joint of the endopod; the two joints of the 

 endopod equal in length or the first a little longer than the second; the one-jointed exopod reaches 

 considerably beyond the end of the proximal joint of the endopod, but not fully to the middle of the 

 distal joint. 



Length of specimens with or without marsupium 1.7 1.9 mm . 



Subadult Male. The four-jointed antennulse (fig. 6f) considerably thicker than in the female, 

 with first joint scarcely or distinctly less than twice as long as deep. Pleopods nearly as in L.manca; 

 the outer remus is considerably or much longer than the oblong peduncle; the terminal setae as long 

 as or a little longer than the rami. -- Length 1.4""". 



Remarks. This small and extremely slender species is easily distinguished from allied forms 

 of this group by the shape of the body and the length of the exopod of the uropods. 



As in the Norwegian species of Leptognathia the mandibles of L. suba-qualis have the molar 

 process tapering to the acute end and besides distally curved. 



Occurrence. This species has been taken by the "Ingolf" at six localities. 



Davis Strait: St. 32: Lat. 66 35' N., Long. 56 38' W., 318 fm., temp. 3.9; 6 spec. 



West Greenland: Mouth of Ameralik Fjord, near Godthaab, at Lat. 64 n' N., 5 70 fm., 



shells; 16 spec. 



East of Iceland: St. 4: Lat. 64 07' N., Long. ni2' W., 237 fm., temp. 2.5; 7 spec. 



St. 58: Lat. 64 25' N., Long. 12 09' W., 211 fm., temp. 0.8; 2 spec. 



North of the Faeroes: St. 139: Lat. 63 36' N., Long. 73o'W., 702 fm., temp. -^- 0.6 ; 35 spec. 



St. 141: Lat. 63 22' N., Long. 658'W., 679 fm., temp. -=- 0.6; n spec. 



This distribution is interesting, as the species has been taken both in the cold area with a 

 temperature of -4- 0.6 and in temperatures above zero, even +3.9; furthermore it occurred near land 

 at a locality where the greatest depth was only 70 fathoms and at another station it was hauled up 

 from 702 fathoms. 



56. Leptognathia tenella n. sp. 

 (PI. IX, figs, i a ic.) 



Female (without marsupium). Body slender, the largest specimen about eight times as long 

 as broad (fig. i a), seen from above nearly cylindrical, with the lateral margins of the thoracic seg- 

 ments slightly convex and the abdomen tapering a little from the base to the end. Carapace much 

 shorter than the two anterior segments combined, seen from above slightly more than half as broad 

 at the front end as behind the middle, not much longer than broad, with the lateral margins some- 

 what convex and the frontal process somewhat feebly developed. 



Antennulse (fig. ib) only a little shorter than the carapace, very characteristic. First joint as 

 long as the three other joints combined, about two and a half times as long as deep, with the 



