MONOGRAPH OF THE EXISTING CEINOIDS. 137 



nule always agrees with the pinnule on the IBrj in character, just as the pinnules 

 on the second element in division series of 4(3+4) always agree with the first 



Fig. ::03. Lateral view of specimen or Ptekometra trichopoda from " Albatross " Station 5179. 



pinnules of the free undivided arms. The following pimiule, however, just above 

 the pinnule on the IBr,, is always very different, and its characters are repeated 



