82 CRUSTACEA MALACOSTRACA. II. 



the bottom and depths exceeding 1400 fathoms, /,. A?iidriipii w&s found in comparativeh- low water 

 at the cold East Greenland. 



The name is given in honour of G. C. Amdrup, Captain in the Danish Navy and the able 

 leader of two Danish exploring expeditions to East Greenland. 



Occurrence. Taken by the II'' Amdrup Expedition at a single locality. 



East Greenland: Forsblad Fjord, Lat. 72° 27' N., 90—40 fni., i spec, (female with mansupium). 



Group b. Uropods long, wUli both rami tzoo-joinfcd and the exopod conspicuously shorter than 

 the Jirst joint of the endopod. Pleopods in the female somezvhat small with the marginal srtff at most 

 as long as the rami or almost rudimentary. Animals slender or 'eery slender. 



Species 52—53. 



The animals of this group are on the whole allied to those of group a, but they are more 

 slender with the pleopods considerably or much reduced and the articulation between fourth and fifth 

 joint of the antenna; feebly developed. 



52. Leptognathia tuberculata n. sp. 

 (PI. VIII, figs. 3a-3f.) 



Female. Rod}- much more slender than in any of the preceding species, but the animal in 

 other respects rather similar in general aspect. — Antennulse (fig. 3 a) slightly more than two-thirds 

 as long as the carapace. First joint a little shorter than the three other joints combined, somewhat 

 more than twice as long as deep, considerably tapering; second joint considerably produced above, 

 distincth' more than twice as long as deep and with the upper margin conspicuously more than half 

 as long as first joint; third joint .short, fourth joint much shorter than the upper margin of the second. 

 — Antennae with the articulation between fourth and fifth joint feebly developed, less or more indi- 

 stinct, and fifth joint about twice as long as the fourth, which is a little shorter than the sixth. 



Chelipeds .somewhat robust (fig. 3 a). Carpus only half as long again as deep, with the distal 

 half strongly expanded downwards and the corresponding part of the lower margin much curved and 

 even subangular. Chela somewhat longer than the carpus and twice as long as broad, with the an- 

 terior lower corner of the hand angular; movable finger a little shorter than the anterior margin of 

 the hand and with the subbasal part slightly narrower than the fixed finger, which 'has four teeth on 

 the incisive margin. 



Thoracic legs somewhat .short (fig. 3 a) and moderately slender. Second (fig. 3 b) and third 

 pairs with the spines on fourth and fifth joint very long; sixth joint nearly half as long again as the 

 fifth, which is a little shorter than seventh with claw. Three posterior pairs (fig. 3 c') with sixth joint 

 as long as seventh with claw; seventh joint without any distinct row of minute setae. 



Four anterior abdominal segments (fig. 3d) with the median row of ventral tubercles low, while 

 the tubercle on the fifth segment is more than twice as high, broadly conical, acute and even a little 

 acuminate. Pleopods almost rudimentary, biraraous, but the rami are shorter and much narrower than 

 the small peduncle (fig. 3e), with a small terminal seta and a few minute marginal setae. — Uropods 



