PYCNOGONIDA— CALMAN. 



17 



Palp— 



Second segment 

 Third 



Fourth 



Fifth 



Sixth 



Seventh 



Eighth „ 



Ninth 



Remarks. — The specimen that I record under this name agrees with the holotype 

 of C. rugosa, and differs from the specimens included under C. frigida in the 

 combination of the following characters : — 



(1) The legs are distinctly, though minutely, spiny, and traces of a median row 

 of spines can be discovered on the proboscis. 



(2) The seventh segment of the palp is not longer than wide. 



(3) The distal contraction of the proboscis is rather more marked. 



On the other hand, it is to be noted that the legs of C. frigida are never entirely 

 devoid of minute spinules, and the present specimen is not so conspicuously spiny as 

 the holotype of C. rugosa ; that in one or two of the specimens referred to C. frigida, 

 the seventh palpal segment is hardly longer than wide, and that, in the present 

 specimen, the claw is no longer relatively to the propodus than in certain specimens 

 referred to C. frigida, while in the holotype of C. rugosa it nearly reaches the 

 proportions found in C. megalonyx. 



In view of the wide range of variation attributed to C. frigida, it seems likely 

 that C. rugosa will prove to be only a spiuose form of that species. 



Colossendeis frigida, Hodgson. 

 G. frigida, Hodgson, 1907, p. 63, PI. ix, fig. 3, PI. x, flgs. 5 and 6. 

 Occurrence. — Station 220, off Cape Adare, 45-50 fathoms ; 1 ,?, 1 ?. Station 294, 

 Eoss Sea, 158 fathoms; 1 ? (?), 2^(?). Station 314, McMurdo Sound, 222-241 

 fathoms; 1 ?. Station 331, Entrance to McMurdo Sound, 250 fathoms; 2 ?. 

 Station 338, Entrance to McMurdo Sound, 207 fathoms ; 4 ?, 1 ^. Station 340, off 

 Granite Harbour, 160 fathoms; 1 $. Station 349, McMurdo Sound, 80 fathoms; 



1 ?, 1 ^- 



"Terra Nova." "Discovery." 



Measurements, in mm. — Syntypes. 



Stn. 349. Stn. 338. Stn. 220. 5 fms. 130 fms. 



Length of proboscis . . 19-25 14-75 16-75 19-2 19-75 



- Greatest diameter of proboscis 2-88 2-24 2-96 4-0 3-28 



D 



