CEPHALOPODS OF THE PHILIPPINE ISLANDS 



53 



Figure 8. — a,h, Euprymna stenodaclyla (Grant): a, dorsal view of male, mantle length 

 18.0 mm.; b, arm arrangement (right I, left I, II, III, IV) showing sucker pattern and 

 hectocotylus of male, c, d, Sepiola trirostraia Voss: c, dorsal view of male paratype, 

 mantle length 11.5 mm.; d, arm arrangement of same (right I, left I, II, III and IV) 

 showing details of hectocotylus. 



slightly, and IV only upon the dorsal edge as is commonly found in 

 most decapods. Protective membranes appear to be absent. 



The arm suckers are in four rows on all arms. They are round 

 or slightly barrel-shaped, inserted laterally on small pedicels with 

 stout bases. As a result they are very easily lost and except in 

 perfectly preserved specimens many of the suckers are missing. 



