36 THE NAUTILUS. 



a complete synonym (as Gould thought it), or a variety (as I con- 

 sider it), then chocolata should be written as above; but if mananensis 

 is a valid species (as Professor Verrill holds), then chocolata may be 

 written as its variety pending further knowledge. Ten specimens 

 collected, all at Rocky Neck. 



Aeolidiella papillosa (L.). It is a question whether our American 

 form may not be as well worth a varietal name as our form of Cory- 

 phella rufihranchialis. Both species are, in European waters, noted 

 for their variability, and have enormous synonymies. I think it 

 much the same sort of question as that whether it is worth while to 

 distinoruish our form of Purpura lapillus — doubtless it is extremely 

 close to the European form, and no one has yet pointed out a con- 

 stant diagnostic difference, yet an American lot could hardly be 

 confused with a European lot. Our form of the present species, in 

 my experience, runs shorter, stouter, pinker and less variegated than 

 the European form, as shown by the numerous and excellent figures 

 accessible. No diagnostic character has been found in the dentition. 

 Eight specimens collected, of which four at each locality ; one a 

 giant of 9 cm., one of an ordinary full adult size of about 6 cm., 

 three smaller adults of 4-5 cm., and one young of about 1 cm. 



Cratena veronica Verrill. One specimen about 1.8 cm. long, 

 taken at Rocky Neck among a thick growth of undetermined hydroids, 

 agreed very closely with Verrill's description of this rare and un- 

 figured species. It was kept alive four days during which colored 

 drawings were made, and then preserved for dissection. 



Galvina picta (A. &c H.), one specimen, adult. Rocky Neck, on 

 hydroids. 



Doto coronata (Gmel.), one specimen, adult. Rocky Neck, on 

 hydroids. 



Dendronotus frondosus (Ascanius), three specimens, one large 

 adult of about 6 cm., two about half that size; the latter at Rocky 

 Neck, the former at Brace's Cove. 



Acanthodoris pilosa (Miiller), one specimen of about 1 cra.> 

 at Brace's Cove. 



LamelUdoris aspera (A. & H.),' eighteen specimens, 5 mm. to 12 

 mm. long, all but three or four at Brace's Cove, on Corallines. 



iQur knowledge of the difficult and critical group of species centering 

 around L. aspera and including a number of quite ineufificiently characterized 

 American forms has not reached a point where identifications can be looked 

 on as reliable. 



