CRUSTACEA MALACOSTRACA. II. 41 



combined, more than half a.s long again as broad; the lateral margins feebly convex posteriorly and 

 then converging to the front angles; the anterior end slightly more than half as broad as the carapace 

 a little from the hind margin; rostral process moderately long, somewhat narrow, acute. 



Antennulse (figs. 2 a and 2 b) considerably shorter than the carapace, somewhat robust. First 

 joint a good deal longer than second and third joints combined, not fully three times as long as deep 

 and tapering considerably to the end; second joint about as long as deep; third joint conspicuously 

 more than twice as long a.s the second, thin, with the longest terminal seta scarcely longer than the 

 joint. — Antennae of usual size; third joint not thickened; fourth joint not twice as long as the pen- 

 ultimate and with long setoe from its distal lower angle; longest terminal seta; much longer than 

 those of the antennulse. 



Chelipeds very slender (fig. 2 b). Basal joint with the posterior process moderately long and 

 its proximal margin rounded; the distance between this margin and the front lower end of second 

 segment only a little shorter than the basal joint. Carpus almost twice as long as the basal joint and 

 a little more than three times as long as deep. Chela small, somewhat shorter than the carpus, three 

 and a half times as long as broad; movable finger slightly longer than the anterior margin of the 

 hand; fixed finger near the base considerably broader than the movable. 



Thoracic segments, as far as could be ascertained in the mutilated specimen, in the main a.s 

 in T. mucronatus n. sp. (comp. description and figs. 3 a of this species), but the difference between the 

 anterior and the posterior breadth of each segment seems to be a little smaller and the lateral margins 

 of the segments a little less convex (fig. 2 a). Second segment (figs. 2 a and 2 b) only slightly more 

 than half as long as the third and without ventral process. - Thoracic legs on the whole slender. 

 Second pair (fig. 2 b) slender and moderately long; fourth and fifth joints with the distal anterior setae 

 somewhat long; sixth joint long, only a little shorter than fifth and fourth joints combined and without 

 any perceptible distal anterior seta; seventh joint with claw nearly as long as sixth joint. Third pair 

 mutilated, but scarcely much different from fourth pair (fig. 2 c) which is very slender, much shorter 

 than second pair, with a rather long seta on the distal anterior angle of fifth joint, sixth joint con- 

 siderably longer than the fifth but slightly longer than seventh joint with claw. Three posterior 

 pairs of legs peculiarly built and unusually long (fig. 2d); second joint not fully four times as long 

 as broad; fourth and fifth joints somewhat slender, though considerably and gradually widened on the 

 anterior side towards the end, and there with a couple of somewhat long, slender spines, fifth joint 

 besides with a couple of slender spines on the terminal inner margin; sixth joint not much longer 

 than the fifth, moderately slender; seventh joint and the short, thin claw combined somewhat more 

 than half as long as sixth joint. 



Abdomen about as long as the two preceding segments combined. — Uropods mutilated, but 

 one exopod (fig. 2e) has been preserved; it is long, very slender, perhaps undivided, but the seta gen- 

 erally found just before the articulation is long and originates even slightly beyond the middle. 



Length of the single specimen 2.05 mm . 



Remarks. T. gracilipes is easily distinguished from all species of Typhlotanais described in 

 this paper by its slender, small chelipeds and the peculiar three posterior pairs of thoracic legs with 

 the long and slender spines on fourth and fifth joints. It is closely allied to T. microckeles G. O. S., 



The Ingolf-Expedition. III. 3. o 



