CEPHALOPODS OF THE PHILIPPINE ISLANDS 



39 



Figure 4. — a, b, Sepiadarium gracilis Voss: a, dorsal view of holotype, mantle length 

 16.0 mm.; b, left ventrolateral arm, tentacle and club and left ventral arm. c-e, Rossia 

 bipapillata Sasaki: c, dorsal view of female, mantle length 39.0 mm.; d, left tentacular 

 club; e, funnel organ and rectum, showing papillae. 



Much work remains to be done on this group, but the species seem 

 to be distinct; they may be separated from one another by means of 

 the following key: 



