CRUSTACEA MALACOSTRACA. II. 



or the hand; fixed finger towards the base much broader than the movable and with about three 

 sharp teeth along the distal part of the incisive margin. 



Thoracic segments extremely characteristic (fig. la). Second segment almost as long as the 

 carapace or third segment and slightly longer than the fourth; each lateral margin is a straight line 

 and the lateral margins converge considerably from the anterior to the posterior end; no ventral pro- 

 cess is found. Third segment similar to the second excepting that it is broadest somewhat behind 

 the anterior margin and the somewhat short anterior part of the lateral margin between its front end 

 and the lateral angle is even concave. Fourth segment shaped nearly as the third. Fifth segment 

 even slightly shorter and somewhat narrower than the fourth, with the major part of the lateral mar- 

 gins subparallel and the margins rounded and converging towards both ends. Sixth segment con- 

 siderably shorter than the fifth and almost twice as long as the seventh, and both these segments in- 

 crease somewhat in breadth from the anterior end to respectively somewhat from or near to the pos- 

 terior margin. Thoracic legs very different from each other. Second pair (fig. ic) long and slender; 

 fifth joint at the anterior distal angle with a seta as long as the joint; sixth joint considerably longer 

 than the fifth and somewhat shorter than seventh joint with claw. Third pair (fig. i d) considerably 

 shorter than second, very slender; sixth joint conspicuously shorter than the fifth, nearly twice as long 

 as seventh joint and with its anterior distal setse somewhat long. Three posterior pairs (figs, i e and i f) 

 moderately slender; second joint nearly four times as long as broad; fifth joint with the distal half 

 somewhat expanded; sixth joint moderately long and somewhat slender, a little more than half as 

 long again as seventh joint with claw. 



Abdomen slightly longer than the two preceding segments combined (fig. i a), somewhat oval, 

 posteriorly nearly truncate with a low, rounded median protuberance. Uropods (fig. ig) short; 



endopod two-jointed with first joint somewhat longer than the second; exopod one-jointed, slightly 

 longer than the proximal joint of the endopod. 



Length of the specimen, which according to the antennulse seems to be an immature 

 male, 2.7 mm . 



Remarks. This species, taken in very great depth, differs strongly from all other species of 

 the genus by the shape and especially the relative length of the thoracic segments, the differences 

 being in reality so great that one is tempted to regard them as being of generic value, but antennulae, 

 antennae, chelipeds, thoracic legs, pleopods and uropods agree with structural features frequently found 

 in Typhlotanais. The long seta at the end of fifth joint of second pair of legs is certainly a good 

 specific character. 



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



South of the Davis Strait: St. 38: Lat. 59 12' N., Long. 51 05' W., 1870 mi., temp. 1.3; i spec. 



24. Typhlotanais gracilipes n. sp. 

 (PL IV, figs. 2 a ae.) 



Female (without marsupium). Body very slender, almost eight times as long as broad. 

 Carapace (figs. 2 a and 2b) long and narrow, as long as second, third and the half of fourth segment 



