290 GASTEROPODA. 



drawing them at frequent intervals. In some they 

 present the appearance' of flowers, as in "Doris 

 (Fig. 231) ; in others they are arborescent, or tree- 



FlG. 231. HORNED DORIS. 



like, or feathered like an ostrich-plume ; and in some 

 they are disposed in rows, on the sides of the body. 

 The greater number of these sea-slugs are carnivorous, 

 and appear to be very voracious. They feed chiefly 

 upon zoophytes and sponges, some adding to their 

 bill of fare the gelatinous Medusae, that are found 

 floating near them, while occasionally they have 

 been seen devouring other Nudibranchs. 



The spawn of the Nudibranchiate Gasteropod is 

 deposited in the shape of a gelatinous band, always 



FlG. 232 TRITON IA HOMBERGI. 



arranged in a more or less spiral form, and fastened 

 by one of its edges to*Corallines or the under surface 

 of a stone. The eggs are minute and very numerous, 



~o * 



