DOROCIDAFJS 7 



Station 4159. Vicinity of Modu Manu. Bott. temp. 78.3". 30-31 

 fathoms. Crs. co. s. brk. sh. for. 



Station 4160. Vicinity of Modu Manu. Bott. temp. 78'. 31-39 fathoms. 

 Co. corln. 



Station 4161. Vicinity of Modu Manu. Bott. temp. 77.9'. 39-183 

 fathoms. Co. corln. 



Station 4162. Vicinity of Modu Manu. 21-24 fathoms. Co. 



Station 4167. Vicinity of Modu Manu. 18-20 fiithoms. Co. s. 



Station 4169. Vicinity of Modu Manu. Bott. temp. 78.6'. 21-22 

 fathoms. Co. 



Bathymetrical range, 13-319 fathoms. Extremes of temperature, 

 78.7-67'. 



DOROCIDARIS A. Ag. 



Dorocidaris abyssicola A. Ag 



Dorocidaris abyssicola A. Ag., 1869. Bull. M. C. Z., I, 9, p. 253; Rev. Ech. PI. I, figs. 1-4. 



Plate 12% figs. 1-5. 

 Further examination of a large series of Dorocidaris from the West 

 Indies and Florida, comparisons being carefully made with a considerable 

 number of European specimens of D. papillata, makes it evident that 

 abt/ssicola can be constantly distinguished from that species. Mortensen's ^ 

 suggestion that the small pedicellariae might be a distinguishing character 

 is however not a happy one, for the pedicellarijB in ahyssicola are very 

 variable. The large globiferous ones show remarkable diversity even in 

 a single individual, as is well shown in the figui-es here given, so that it 

 would be unwise to lay any stress on their form as a systematic character. 

 In general it may be said that the pedicellariae agree closely (as would 

 naturally be supposed) with those of papillata. The smooth, white spines 

 afford the most obvious character by which abyssicola may be recognized. 



1 Ingolf Exped. Echiiioidea, 1903, Pt. I, p. 34. 



-g' 



