21 



Remarks. — According to the original description of this species the femur should 

 be slightly shorter than the first tibia. This, however, is not always the case ; even in 

 a specimen labelled by Mr. Hodgson as " type," and here selected as holotype, the 

 femur is a little longer than the tibia in the left leg, although shorter than it in the 

 right leg of the third pair (see measurements above). 



The smaller of the specimens in the " Terra Nova" collection do not differ in any 

 important respect from the holotype. In particular, they agree with it in having only 

 a median row of minute setae on the dorsal surface of the trunk. The two largest 

 specimens, however, of which measurements are given above, have the whole dorsal 

 surface rough with short setse and the legs rather more spiny. The general agreement 

 in other respects leads me to regard these as only a spinose form of C. (jlacialis. The 

 great length of the legs in the female from Station 338 is noteworthy. 



It seems very likely that Bouvier's C. gracilipes will prove to be identical with 

 this species. Almost the only definite characters in which they appear to diverge, 

 according to Bouvier's account, are ( 1 ) the form of the proboscis, which in C. gracilipes 



