54 Dr. Johnston on Scottish Mollusca. 



appearance and habits of the creature to identify it as his 

 D. verrucosa. The wonder is how this should ever have been 

 considered the same with the D. verrucosa of Linnaeus and 

 Cuvier, — a large species found in the Indian seas, and differ- 

 ent in every respect. Dr. Fleming says the branchial plumes 

 are about twenty-four in number, " arranged in a semicircle, 

 those at each end shortest." It is very difficult to ascertain 

 their exact number from their close apposition, but I think 

 they do not much exceed twelve. 



4. D. lavis, " cloak smooth in the middle, slightly tuber- 

 culated towards the margin ; branchial plumes eight in num- 

 ber." Fleming. 



Doris laevis, Lin. Syst. 1083. Mull. Zool. Dan. Prod. 229- Turt. Gmel. 



iv. 79. Cuv. Mem. v. 26. Fleming in Edin. Encyclop. xiv. 618. Lam. 



Anim. s. Vert. vi. i. 312. Flem. Brit. Anim. 282. 

 Hab. " Common among the Zetland Isles," Rev. Dr. Fleming. 



Desc. " Length about half an inch, rounded in front, nar- 

 row behind ; of a milk-white colour." Fleming. 



5. D.pilosa, body ovate, tumid, the cloak tomentose with 

 an ample margin ; branchiae from 7 to 9, plumose. Plate II. 

 fig. 9, 10. 



Doris pilosa, Turt. Gmel. iv. 79. Lam. Anim. s. Vert. vi. i. 312. Cuv. 



Mem. v. 26. — D. tomentosa ? Cuv. he. cit. 26. 

 Hab. Under Algse between tide marks. Coast of Berwickshire, occa- 

 sionally. 



Desc. Body less than an inch in length, oval, very convex 

 dorsally, snow-white, but so pellucid that its purity is slightly 

 stained by the opacity of the internal viscera : the cloak tomen- 

 tose with ^mall papillae, the margin ample and plain. Foot 

 oval, obtuse. Dorsal tentacula yellowish, cylindrical, lamel- 

 late, without sheaths. Veil above the mouth large, somewhat 

 triangular, produced at the superior angles. Branchia white 

 like the body, beautifully plumose, the leaflets about seven, 

 but it was difficult to ascertain the number exactly. — The spe- 

 cific name tomentosa so well expresses the white woolly ap- 

 pearance of the cloak in this species that it seems preferable 

 to pilosa, but I feel so far persuaded that the names have been 

 applied to variations of the same animal as to prefer that which 

 has the claim of priority. 



