58 



CRUSTACEA MALACOSTRACA. II. 



two preceding segments combined. — Uropods somewhat short; endopod (fig. 9b) two-jointed, with 

 the first joint somewhat longer than the second; exopod reaching about the middle of the distal joint 

 of the endopod, divided by a suture at or slightly beyond the middle and with the proximal part of 

 its long terminal seta quite unusually thick. 



Length 2.15 mm . 



Remarks. T. incequipes is easily distinguished from all other species by the peculiarly 

 elongate fourth joint of second thoracic legs. Antennae, chelipeds and uropods afford various other 

 characters, but the species is on the whole allied to T. mixtus n. sp. 



Occurrence. Taken by the "Iugolf" at a single deep-sea station. 



Davis Strait: St. 36: Lat. 6i°5o' N., Long. 56°2i' W., 1435 fm., temp. 1.5 ; 38 spec. 



36. Typhlotanais finmarchicus G. O. Sars. 

 (PI. VI, figs. 2 a— 2 b.) 



1881. Typhlotanais finmarchicus G. O. Sars, Arch, for Math, og Naturv. B. 7, p. 36. 

 1896. G. O. Sars, Account Crust. Norway, Vol. II, p. 20; PL IX (Female and 



adult Male). 



In the last-named work Sars has published a description and numerous figures of this species, 

 which differs from all other forms of the genus, excepting T. mixtus n. sp., by some characters. 



The antennulse (fig. 2 a) are shorter than the carapace, their first joint between more than half 

 as long again and a little less than twice as long as the two other joints combined, about three times 

 as long as deep; second joint conspicuously longer than deep; third joint more than twice as long as 

 the second, with the longest terminal seta not fully as long as the joint. Second pair of legs some- 

 what short; sixth joint only a little longer or even shorter than seventh joint with claw. Third pair 

 of legs with fourth and fifth joints uncommonly short in proportion to thickness, each being only 

 about half as long again as broad; seventh joint with claw considerably more than half as long as 

 sixth joint or only a little shorter than this joint. 



Sars' figure of the carpus of the chelipeds is not correct, as its greatest depth is not situated 

 at the end of the preceding joint, but much nearer the distal end; the carpus is between two and a 

 half and two times as loug as deep; the movable finger of the chela is a little or slightly shorter 

 than the anterior margin of the hand. Sars' figure of the uropod does not agree with the uropods 

 in my numerous specimens, among which some co-types presented by that author; I have drawn a 

 normal uropod (fig. 2 b) and this figure shows that in the eudopod the proximal joint is less than 

 half as long again as the distal, while in Sars' figure the proximal joint is about twice as long as the 

 other: furthermore Sars' figure shows the proximal joint of the exopod to be almost longer than the 

 distal, while I always found (fig. 2 b) the proximal joint conspicuously shorter than the distal. Finally, 

 it may be mentioned that the ventral side of second thoracic segment has frequently a rather small 

 or very small, acute process originating behind the front end of the segment and directed essentially 

 forwards, but sometimes this process could not be found in specimens where it might be expected. — 

 As to all other features I refer to Sars; the differences between T. finmarchicus and T. mixtus are 

 pointed out below. 



