CRUSTACEA MALACOSTRACA. II. 



39 



on the posterior part of the lateral margins. — Thoracic legs moderately long and rather .slender; 

 second pair (fig. 6 b) with sixth joint only a little shorter than fifth and fourth joints combined and 

 slightly longer than seventh joint with claw; sets short. Third pair with sixth joint as long as the 

 fifth plus half of the fourth; seventh joint with claw- as long as fifth joint; setse short. Seventh pair 

 (fig. 6d) moderatel)- long; second joint slender, nearly five times as long as broad; fourth and fifth 

 joints moderately broad but scarcely expanded and without any armature; sixth joint proportionateh- 

 somewhat stout, being not much thinner than the fifth and about as long as the fifth plus half of 

 the fourth; seventh joint with claw quite short. 



Abdomen as broad as the last thoracic segment, with the sides somewhat convex, a little 

 shorter than the two preceding segments combined. — Uropods of moderate length (fig. 6e); endopod 

 two-jointed with the proximal joint somewhat longer than the distal; exopod a little shorter than the 

 endopod, two-jointed, with the proximal joint a little shorter than the distal. 



lycngth of the single specimen (probably a female) 1.20'""'. 



Remarks. This species differs from all other forms of the genus by its gigantic carapace, 

 the very short and thick antennulse, the huge process on the lower side of second thoracic segment 

 and the serrate lateral margins of the three (four) anterior thoracic segments. In some other features 

 and especially in the dorsal aspect of the thoracic segments it resembles considerably T. irregularis n. sp. 



Occurrence. The single specimen has been captured by the "Ingolf. 



South-West of Iceland: St. 78: Lat. 60° 37' N., Long. 27° 52' W., 799 fm., temp. 4.5°; i spec. 



23. Typhlotanais pulcher n. sp. 

 (PI. IV, figs. la— ig.) 



Specimen without marsupium. Body very slender, more than eight times as long as 

 broad. — Carapace considerably longer than broad but onI\- slightly longer than the unusually long 

 second thoracic segment (figs. la and ib), lateral margins rounded posteriorly and from there converg- 

 ing gradually forwards to the anterior margin, which is somewhat longer than half of the breadth 

 of the carapace, and the rostral process is somewhat long, subacute. 



Antennulse (figs, i b and i c) nearly as long as the carapace, moderately slender. Fir.st joint 

 somewhat longer than the two other joints combined, about three and a half times as long as deep, 

 and. seen from the side, not tapering, which renders it probable that the specimen may be an imma- 

 ture male; second joint about as long as deep, not half as long as the third joint, which has its 

 proximal part slightly thickened on the lower side; terminal setse as long as the two distal joints 

 combined. — Antenna; moderately slender; third joint not thickened; fourth joint a little more than 

 twice as long as the penultimate, and both these joints with long setae at the end, while the setae of 

 the terminal joint are still longer, though a little shorter than the longest terminal antennular setse. 



Chelipeds (fig. ic) moderately slender. Basal joint with the proximal protuberance scarcely free 

 and of moderate length; its posterior end far removed from the front low'er end of second thoracic 

 segment. Carpus a little less than three times as long as deep. Chela a little longer than the carpus, 

 three times as long as broad; movable finger rather slender and much longer than the front margin 



