26 



"TERRA NOVA" EXPEDITION. 



Legs comparatively stout, greatest thickness of femur more than one-seventh of 

 its length. Femur distinctly longer than first and shorter than second tibia. Tarsus 

 subequal to propodus, claw more than three-fourths of length of latter. 



Surface of trunk and proboscis smooth, lea's rouah with very minute 

 spinules. 



Measurements, in mm. — 



Length of proboscis 



Greatest diameter of proboscis' 



Length of trunk 



Width between second and third lateral 



processes 

 Width across second 

 Length of abdomen 

 Third right leg — 



Coxse 



Femur 



First tibia . 



Second tibia 



Tarsus 



Propodus 



Claw . 

 Palp- 

 Second segment 



Third 



Fourth ,, 



Fifth 



Sixth ,, 



Seventh ,, 



Eighth „ 



Ninth 



lateral processes 



96 

 12 

 52 



2 



2 



Remarks. — This species appears to differ from C. rohusta chiefly in having the 

 lateral processes much closer together, the proboscis longer than the trunk, and the 

 femur distinctly shorter than the second tibia. 



In two out of the three specimens the palp of one side is imperfectly formed, the 

 terminal segment being minute and fused with the penultimate. It is possible that in 

 these cases the terminal segment is in process of regeneration after removal by accident, 

 but, if so, the rarity of similar cases in other species lacks explanation.* 



* Vanhoffen (1914, p. 580) mentions a deformation of the palp of Aimnotliea glacialis, Hodgson, due 

 to the presence of a parasitic Isopod, Coulmannia frigida, Hodgson. 



