PLATE III. 



Kid. 8. — Male vieweil from the ventral surface; the mantle h;is lieen turneil hack nverthe posterior end of the hody. 

 exposinir its inner surface anil the organs containeil in the mantle chamlH-r. 

 A, anus. 

 DT, difrital tentacles, composing the cephalic sheath. 



E, eye. 



F, funnel. 



IP, interl)ranchial papilla. 

 ()", postocular tentacle. 

 V, jieni-s. 



I'A, preanal papilbc 

 PP, pericardial i^ore. 

 KA, anterior renal pore. 

 KP, jio.sterior renal pore. 

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