No. 9. — 1856=8.] CEYLON nudibranchiata, &c. 



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CEYLON NUDIBRANCHIATA MOLLUSCA. 

 (naked molluscs.) 



Sub-Kingdom. Mollusca. 

 Class. Gasteropoda. 

 Order. Nudibranchiata, 

 Fam. DoRiDiDiE. 

 Branchial plumes surrounding the vent on the medio-dorsal line. 



Sub- Family. Dorldin^e. With a cloak. 

 Genus Doris. Linnceus. 



Animal oblong, covered by a mantle ; four tentacles, two 

 superior or dorsal, clavate or conical, retractile within cavities, 

 sometimes slightly sheathed. The two inferior or oral tentacles 

 placed on each side of the mouth, sometimes absent or replaced 

 by flat appendages ; eye specks immersed behind the dorsal 

 tentacles, not always visible in the adult ; lingual membrane 

 with numerous lateral teeth ; rachis often edentulous ; 

 stomach simple ; liver compact ; skin strengthened with spicula, 

 more or less definitely arranged. 



Doris gloriosa. Kel. 



Synonym. Doris marginata ? Leuchart. 



Body nearly 3 inches long ; oblong, of a pinkish colour 

 minutely dotted with red and white. Mantle large, oval, broad, 

 when expanded entirely covering the foot. Back mottled with 

 pink, red and yellow, and minutely punctulated with red and 



