EOLIS NANA. 



occurs under stones left dry by the receding tide. Like the Dorides that inhabit similar 

 situations, it is very liable to crawl up the side of the vessel in which it is kept, and there 

 perish for want of moisture. In consequence of this propensity to crawl out of the water, the 

 true littoral species are all difficult to keep alive ; the deep-water species, on the contrary, 

 rarely venture above the surface of the fluid. 



Eolis nana spawns in May, June, and July, or occasionally as late as August. The 

 spawn resembles that of E. olivacea, and is found on the under surface of stones. 



Figs. 1, 2, 3. Eolis nana, different views. 



4. Two of the papillse, more highly magnified. 



