PYCNOGONIDA— CALMAN. 



15 



of importance. Bouvier's measuremeuts of his single specimen show some ditierences 

 of proportion, the proboscis in particular being a little longer and noticeably more 

 slender, especially in the distal third. 



The adult male in the " Terra Nova " collection shows a very well-developed 

 sub-chelate termination of the ovigers like that described above in C. scotti. In the 

 type-specimens from the " Discovery " the spines of the ovigers are very much worn 

 (in the male only the sockets are left), and the enlargement of the distal spine to form 

 a " thumb " is not so easily seen. In the immature " Terra Nova " specimens the 

 distal spine is not enlarged. 



The dorsal gland-openings of the second coxae, not visible in Bouvier's specimen, 

 are easily seen in our adult specimens of both sexes. 



Colossendels megalonyx, Hoek. 

 C. vicgalonyx, Hoek, 1881, p. 67, PL ix, figs. 1-3. 

 Occurrence. — Station 38, near Falkland Islands, 125 fathoms ; 1 $. 

 Measurements, in mm. — 



Length of proboscis . . 



Greatest diameter of proboscis 



Length of trunk ..... 



Width between first and second lateral processes 



Width across second lateral processes 



Length of abdomen . . . 



Third right leg — 

 Coxae . 

 Femur . 

 First tibia 

 Second tibia 

 Tarsus . 

 Propodus 

 Claw 



Palp- 

 Second segment 

 Third 

 Fourth 

 Fifth 

 Sixth 

 Seventh 

 Eighth 

 Ninth 



