piiYLLTmrnyF:. 15 



Fam. PHYLLIDIID^E. 



Tongue and jaws none; tentacles dorsal, anterior, retrac- 

 tile ; labial palps close together, conical, small. Gills in the 

 form of radiating folds on the under side within the edges 

 of the mantle. Vent median, posterior. 



The tentacles in this family are dorsal and retractile like 

 those of Doris, and the vent is on the middle of the hind 

 part of the back. In the disposition of the gills, which are 

 in the form of oblique lamellas disposed round the body 

 under the edge of the mantle, these animals resemble the 

 Chitonidce. 



Genus PHYLLIDIA, Cuvier. 



Body depressed, oval. Labial palps small, distinct, slender. 

 Mantle hard, convex, smooth. Vent dorsal, in the middle 

 of the hinder part of the back. 



Syn. Phyllide, Swainson. 



Ex. P. trilineata, Cuvier, pi. 08, fig. 4. 



The head in this genus is small, and concealed under 

 the front of the coriaceous mantle ; the mouth is probosci- 

 diform, without jaws or tongue; the dorsal tentacles are 

 retractile into cavities; and the buccal appendages are 

 small, distinct, and slender. The position of the vent, and 

 the smooth mantle, distinguish this genus from Fryeria. 



Species of Phyllidia. 



albonigra, Quay and Ga'nn. Arabica, Ehrerib, 



amiulata, Gray. trilineata, Cuv- 



VOL. II. II 



