46 CRUSTACEA MALACOSTRACA. II 



a small spine on the posterior side and near the end of sixth joint. It agrees above all with T. eximius 

 in having the carapace considerably longer than the two anterior thoracic segments combined, in 

 having the antennulae and antennae terminating in extremely long setse and in possessing an acute 

 process (on fig. 5 a overlapped and therefore rendered by dotted lines) on the ventral side of second 

 thoracic segment. - The chelipeds are characteristic; the carpus is considerably longer than the basal 

 joint and about two and a half times as long as deep; the chela is a little 01 somewhat longer than 

 the carpus, between three and a half and four times as long as broad, and the movable finger is only 

 a little shorter than the anterior margin of the hand. 



Marsupium is not found in any of my specimens. Somewhat young specimens are on the 

 whole more clumsy, with the appendages shorter and more robust than in nearly fullgrowu spec- 

 imens. The largest specimen at hand is 1.56 mm . — In a specimen measuring 1.27 mm the antennulae 

 (fig. 5d) are considerably thicker, shaped nearly as in the young male of T. eximius, and therefore I 

 consider this specimen to be an immature male. 



Occurrence. T. penicillatus was brought home by the ''Ingolf from two stations. 



Denmark Strait: St. 90: Lat. 64° 45' N., Long. 2o,°o6' W., 568 fm., temp. 4.4 ; 1 spec. 



South-West of Iceland: St. 78: Lat. 6o°37' N., Long. 27°52 ( W., 799 fm., temp.4.5 ; 15 spec. 



Distribution. Sars established this fine species on two specimens taken by him "at Saue- 

 sund, west coast of Norway, from depths of 50 to 100 fathoms". 



28. Typhlotanais inermis n. sp. 



(PI. IV, figs. 6a- 6 g.) 



Female (without marsupium). Moderately robust, about five and a half times as long as 

 broad. — Carapace (figs. 6 a and 6b) about as long as the two following segments combined, slightly 

 longer than broad, with the lateral margins slightly converging from the base to beyond the middle 

 and then more curved to the antero-lateral angles which are somewhat removed from the outer base 

 of the antennulae; the distance between these angles is more than two-thirds as long as the breadth 

 of the carapace in front of its posterior margin, and from each angle the anterior margin is directed 

 inwards and somewhat forwards to the acute median angle, each half of this front margin being 

 slightly concave; the result is, that the carapace is pentagonal. 



Antennulae nearly as long as carapace and half of the next segment combined, very slender. 

 First joint is, seen from the side, between four and five times as long as deep and tapers considerably 

 from somewhat beyond the base to the end (fig. 6 a); seen from above (fig. 6 b) this joint has the basal 

 fifth very broad, the outer margin angular at the end of that fifth, and from this angle the joint, 

 which is distinctly less than three times as long as broad, tapers strongly to the distal end; it is 

 somewhat longer than the two other joints combined. Second joint slender; third joint more than 

 twice as long as the second, very slender, with the terminal setae very long, the longest being some- 

 what longer than the two proximal joints combined. Antennae of moderate length, rather slender; 

 second joint somewhat expanded above, third scarcely thickened, fourth somewhat less than twice as 

 long as the penultimate joint; some of the terminal setae about half as long as the long setae of the 

 antennulae. 



