156 THE VOYAGE OF H.M.S. CHALLENGER. 



The abdominal appendages are all similar to each other ; there is no difference in 

 structure between the last pair and the first. 



Each consists (fig. 5) of a short basal joint, with which are articulated two 

 broad foliaceous rami, which have a rounded outer margin and a straighter inner 

 margin. 



Station 218, between New Guinea and Admiralty Islands, March 1, 1875; lat. 2° 33' 

 S., loDg. 144° 4' K; depth, 1070 fathoms; blue mud. 



