64 



THE VOYAGE OF H.M.S. CHALLENGER. 



smaller specimen, obtained at Station 14G and measuring about 35 mm. in length, gives 

 off about twenty-nine pedicels and thirty-five processes. These statements prove 

 that the number of processes and pedicels is pretty much independent of the size of 

 the animal. The ventral surface is flat or slightly concave, while the dorsal, on the 

 contrary, is extremely convex. Both extremities of the body are evenly rounded. The 

 mouth and anus are ventral, the former having a more terminal position. The colour 

 varies considerably, most of the individuals having a light grey or glassy colour, while 

 those found at Station 157 are of a darker or lighter violet. Before continuing the 

 description, it seems proper to give the following table, exhibiting in what degree varia- 

 tion occurs with regard to the pedicels and processes : — 



1 All measurements are given in millimetres. 



