DORIS PROXIMA. 



as seen through the foot, is of much larger volume and extends farther forward than in the 

 other species. The character derived from the liver, in the different species of Doris, is very 

 constant. In its general appearance B. proximo, is rather larger, and usually of a much deeper 

 colour than B. aspera. The latter, indeed, is almost constantly white, and in only one or two 

 rare instances have we seen it of a yellowish hue. 



Mr. Price, to whom we are indebted for the knowledge of this species, informs us that it 

 is not uncommon on the shore at Birkenhead during the spring months, but was more abun- 

 dant a few years ago, before the recent great alterations in that locality. It spawns about 

 the latter end of February. " The ova are dull yellow, thickly scattered through a transpa- 

 rent riband, forming an oblong, angular spiral, very inconspicuous on the brown stones. The 

 ova contain two, three, or four yolks each." 



Figs. 10, 11. Back and foot views of Doris proximo,. 



12. A portion of the mantle much enlarged. 



13. A branchial plume. 



14. A dorsal tentacle. 

 15, 16. Spicula. 



