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 D. proximo, is rather larger, and .usually of a much deeper
colour than D. 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 abundant
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 transparent
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.