22 



Remark*. - This form was first recorded by the present author as a new spe- 

 cies under the name of Tanais depressus. I have, however, subsequently convinced 

 myself that in reality it is identical with the form described by Prof. Lillj-borg 

 at an earlier date, as Tanais ceqviremis. The species may be recognized by the 

 pronouncedly depressed form of the body, the comparatively strong chelipeds and 

 the structure of the uropoda. Prof. Lilijeborg states that both rami of the latter 

 are biarticulate, but the inner one does not in fact exhibit any distinct subdivi- 

 sion. and may mor properly be said to be uniarticulate. 



Occurrence. The species is rather common along th-i- whole south and west 

 coasts of Norway, in depths ranging from 30 to 100 fathoms. It extends north- 

 wards to the Lofoten Isles. 



Distribution. Bohuslan (Lilljeb.) 



5. Typhlotanais assimilis, G. 0. Sars. 



(PI. X, fig. 2). 

 Typhlotanais assimilis, G. 0. Sars, 1. c. p. 3(i. 



tiT*. 9- Body rather slender, linear, subdepressed, about 

 7 times as long as it is broad, with the cephalosome comparatively large, excee- 

 ding in length the 2 anterior segments of the mesosonie combined, and but slightly 

 narrowed in front. 1st free segment of mesosonie considerably shorter than 

 the others, which arc rectangular in shape. Metasome longer than the last 2 

 segments of mesosoine combined, terminal segment about the length of the 2 

 preceding ones taken together, and obtusely produced at the tip. Superior an- 

 tenme rather elongated, conically tapering, with the basal joint but little longer 

 than the other 2 combined, terminal joint long and narrow. Inferior antenna^ 

 with the 2nd joint of the peduncle rather expanded and finely serrated on the 

 upper edge. Chelipeds not nearly so strong as in T. ii'ijriri'ini*. and attenuated 

 distally, hand about the length of the carpus, but much narrower, fingers shorter 

 than the palm. 1st pair of pereiopoda much longer than the 2 succeeding ones, 

 which are very small, with the propodal joint oblong oval in form and somewhat 

 compressed; the 3 posterior paivs resembling in structure ^hose in T. o't/rirciii/*, 

 though having the basal joint less tumefied. Uropoda somewhat longer than the 

 last segment of the met.-isome, both rami distinctly biarticulate and rather unequal, 

 the outer one being much shorter than the, inner, though scarcely narrower. 

 Length 1.70 mm. 



It'i'iiittrf,-*. The present species is nearly allied to T. fi'</nr<"ii//s, but 

 easily distinguishable by the comparatively larger sixe of both the cephalosome and 



