APPENDIX. 



(1) Doris Zetlandica. 



Mr. Barlee obtained a specimen of this new Doris in Shetland in the summer of 1849. 

 It differs from all the other British species with retractile branchiae in the form of the tubercles. 

 The dorsal tentacles are finely laminated, the laminae nearly uniting in front. The oral 

 tentacles tubercular. The most remarkable difference, however, is in the character of the 

 tongue, which in this species is covered with long, slender, linear, subclavate spines, 

 denticulated on the inner margin. We are indebted to Mr. Jeffreys, of Swansea, for the 

 opportunity of dissecting the specimen, which we had previously examined and sketched 

 through the kindness of Mr. Barlee. This gentleman announced it, with his other discoveries 

 in Shetland, to the British Association Meeting at Birmingham in 1849. 



(.2) Doris millegrana. 



Two specimens of this Doris, which we do not find before described, are preserved in 

 Dr. Leach's Collection in the British Museum. They are in the same bottle with a specimen 

 of Boris tuberculata (Britannica, Leach), with which they appear to have been confounded. 

 The label indicates that they were sent from Torbay by Mrs. Griffiths. In spirits they are of a 

 dull yellow colour, with one or two small purplish blotches near the margin of the cloak in 

 one of the specimens. The cloak extends considerably beyond the foot, and is smooth on the 

 under side ; above it is covered with minute, close-set granular tubercles, very little raised 

 above the surface, and of nearly equal size, having a few smaller ones interspersed. The 

 dorsal tentacles are retracted in both specimens, but may be seen to taper gradually to a point 

 above ; the apertures have a thin, undulating edge. The oral tentacles are linear. There are 

 six bipinnate branchial plumes, retractile within a cavity, with a nearly smooth margin. The 

 foot is transversely slit in front, with the upper lamina strongly notched in the centre. 



This species comes nearest to B. Johnstoni, but is at once distinguished by having only 

 six plumes, which are arranged as in B. tuberculata, and do not form a cup as in the former 

 species. The tubercles, too, are much shorter than those of D. Johnstoni, a little larger, and 

 not quite so closely set, giving the surface a delicate granular appearance. The tongue 

 resembles a good deal that of B. tuberculata ; the spines are of a similar character, smooth and 



