PLATE V. 



Fig. 7. — Male, viewed from the dorsal surface. The hood, mantle, and body wall have been cut open in the median 

 line in order to show the mouth parts, the hsemocoel, and the ccelom, with their contained organs. 

 Ao, aorta. 

 ASp, antispadix. 

 B, buccal mays. 



BM, buccal membrane, cut open dorsally to show the tips of the jaws. 

 BYV, wall of the posterior portion of the body. 

 CR, crescentic ridge upon the posterior face of the hood. 

 DBR, dorsal buccal retractor muscle. 



DM, dorsal portion of the mantle cut open and folded down. 

 DT, digital tentacles. 

 <iL, genital ligament. 

 Ho, hood. 



L, L, lobes of the liver, covered by the hsemoccelic membrane. 

 Oe, oesophagus, lying in the hsemoccel. 

 S, siphuncle. 



SL/L, superior labial lobe. 

 Sp, spadix. 

 St, stomach. 

 T, testis. 

 I T J, upper jaw. 



VM, ventral portion of mantle. 



X, junction of the hsemocoelic membrane and body wall along the line of the dorsal aponeurotic band. 

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