318 GASTEROPODES. 



specks or eyes, apart from each other, not deep-seated in the flesh, but 

 quite conspicuous. 



The middle of the back is bare. Seven pair of elongated, clavate, 

 truncated, branchial papillae border the body. The upper four are con- 

 siderably apart ; the other ten more crowded together ; and the lowest 

 pair seem as if merely cleft asunder. The body is of a dingy colour, 

 with white specks ; the branchise, also speckled, shew a dark centre, 

 amidst a lighter exterior. 



Only one specimen occurred, which was lively and active, and sur- 

 vived about three weeks. 



PLATE XLV. 



FIG. 28. Eolls ventilabrum Fan-head Eolis : back, enlarged. 



II. Among the fuel in pools, on the southern shore of the Forth., 

 and down as far as Eyemouth, is found an animal black to the eye, 

 which is now ascribed to the Doridean tribes. 



Length above a line, back very convex, belly narrower, best seen 

 as it swims supine ; front of the head thick,, apparently cleft ; eyes two, 

 black, far apart, seated amidst a white portion on the upper surface. 

 The body appears enlarging like a barrel over the narrow sole ; so that 

 the animal seems carrying a load. 



On June 5, specimens, substances which I considered ova, were 

 deposited on a fucus. 



This animal dwells at about half tide. 



When Dr Johnston first observed it, he proposed that it should be 

 denominated LimaponHa nigra. Messrs Alder and Hancock, in reclaim- 

 ing it to the present tribe, propose a new order for its reception. Along 

 with a description they give its anatomy. Annals and Magazine of 

 Natural History, Science, fyc. Second Scries, vol. i. p. 402. Plate xix. 

 figs. 4, 5, C. 



