NUDIBRANCHIATA 433 



when severed, have been described as parasitic worms. TetJiys 

 feeds on molluscs and Crustacea. 



Fam. 3. Lomanotidae. — Body slug-like, dorsum prominent, 

 undulating or lobed, with one row of small cerata, no tentacles, 

 rhinophores much foliated, radula with uncinated dentate laterals. 

 Single genus, Lomanotus. 



Fam. 4. Dotonidae. — Body slug-like, small, two rows of cerata, 

 each ceras surrounded by a ring of tubercles, rhinophores simple, 

 radula uniseriate. Single genus, Doto. 



Fam. 5. Dendronotidae. — Body slug - like, somewhat com- 

 pressed, two rows of arborescent cerata, no tentacles, frontal 

 margin with arborescent papillae, rhinophores arborescent, radula 

 multiseriate. Genera : Campaspe, Dendronottis. 



Fam. 6. Bornellidae. — Two rows of dorsal papillae, with 

 branchiform appendages at the base, rhinophores foliate, radula 

 multiseriate. Single genus, Bornella. 



Fam. 7. Scyllaeidae. — Body oblong, compressed, two large 

 foliated cerata with branchial appendages on the inner side, no 

 tentacles, rhinophores large, radula multiseriate. Single genus, 

 Scyllaea. 



Fam. 8. Phyllirrhoidae. — -Body much compressed, with bovine 

 head and neck, tail tapering, no tentacles, rhinophores simple, 

 teeth few, no marginals. Single genus, Phyllirrhoe. 



Fam. 9. Pleurophyllidiidae. — Body elongate-oval, snout broad, 

 covered by an arched shield with lateral angles prolonged, 

 branchiae consisting of two rows of lamellae placed between the 

 notaeum and the foot, no tentacles, rhinophores short, hidden, 

 radula multiseriate. Single genus, Pleurophyllidia. 



Fam. 1 0. Pleuroleuridae. — Animal resembling Pleurophyllidia, 

 but without the branchial lamellae. Single genus, Pleuroleura. 



Fa.M. 11. Tritoniidae. — Body long, two rows of unequal 

 arborescent cerata, rhinophores witli ramose appendages, liver not 

 prolonged into the cerata. Genera : Tritonia, Marionia. 



Section 2. Holohepatica. — Cerata medio -dorsal, retractile 

 or not, usually paucifoliate, liver never ramified, usually no 

 jaws. 



Fam. 1. Dorididae. — Branchia consisting of a circle or semi- 

 circle of pinnate leaves united at the base, svunounding the anus, 

 almost always retractile into a cavity, rhinophores foliate, no 

 suctorial proboscis, radula multiseriate. Genera : Bathydoris, 

 VOL. Ill 2 F 



