PYCNOGONIDA— CALMAN. 



29 



Nymphon charcoti, Bouvier. 

 N. Charcot!, Bouvier, 1911, p. 1138 ; id., 1913, p. 81, text-figs. 32-31. 

 Occurrence. — Station 294, Eoss Sea, 158 fathoms ; 

 McMurdo Sound, 80 fathoms ; 1 ?. 



Measurements, in mm. — 



Length of proboscis 



Diameter of proboscis 



Length of trunk 



Length of cephalic segment 



Greatest width of eephalon 



Width of neck 



Diameter of ocular tubercle 



Width between first and second lateral processes 



Width across second lateral processes 



Third right leg — 



First coxa 



Second coxa 



Third coxa 



Femur . 



First tibia 



Second tibia 



Tarsus 



Propodus 



Claw 



Palp- 



Second segment 

 Third 



Fourth ,, 

 Fifth 



Remarks. — Our largest specimen, of which measurements are given above, 

 considerably exceeds the maximum dimensions given by Bouvier, and shows that the 

 species takes a place among the largest of the genus. Its limbs are much less setose 

 than those of the male figured by Bouvier, but the other two females, as well as the 

 male, have the setse even longer and more numerous than in his figure. The male 

 has the femora considerably less dilated than in Bouvier 's specimen, not differing in 

 this respect from the females. The claws of the legs are in no case conspicuously 

 longer than the propodus, and in the specimen measured they are distinctly shorter. 

 In all other respects the specimens agree very well with Bouvier 's account, and confirm 

 his opinion that the diff'erences between his specimens were not of specific value. 



