NUDIBRANCHIA TA. 



2:7 



present, in the living state, extremely interesting objects, as the 

 animals keep extending and withdrawing them at frequent in- 

 tervals. In some they present the appearance of flowers, as in 

 Doris (Fig. 232) ; in others they are arborescent, or tree-like, or 



FIG. 231. TRITOXIA HOMBERGI. 



FIG. 232. HORNED DORIS. 



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 



F:G. 233. YOUNG OF EOLIS. 



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 



