DORIS. 563 



Our brief account of the genera and species, and our illus- 

 trations of an example (in most cases) of each group will 

 serve as a working manual and synopsis of the present 

 condition of the subject. 



DORIS. LiNN^us. 



Body elhptical, depressed, rarely convex, covered by an 

 ample mantle, the surface of which is in most species tuber- 

 culated, and the margins extend over the head and the 

 sides of the foot; variously coloured. Head hidden by 

 the mantle, furnished with an oral veil, which is sometimes 

 produced into two labial tentacula. Dorsal tentacula two, 

 subclavate, laminated, retractile within a cavity. Branchise 

 plumose, surrounding the vent, which is placed medi- 

 ally on the hinder portion of the back. Genital orifice at 

 the right side. 



The species of this genus inhabit for the most part the 

 littoral and laminarian zones, and appear to be carnivorous. 

 They are found in all parts of the world, and are often of 

 large size and exquisite beauty. A full account of their 

 anatomy and development is contained in the fifth part of 

 the Monograph by Alder and Hancock. 



1. D. TUBERCULATA, Cuvicr. 



Doris tulerculata, Cuvier, Mem. Moll. v. 23, pi. 2, f. 5. — Johnston, Ann. Nat. 

 Hist. vol. i. p. 50, pi. II. fig. 1-3. 

 „ argo. Pennant, Brit. Zool. vol. iv. p. 82, pi. 24. — Fleming, Brit. Ann. 

 p. 282. 



Body (three inches and more in length) yellowish grey, 

 with brownish and pink cloudings, ovate, depressed ; cloak 

 ample, spinulose, closely covered with minute round tu- 

 bercles. Dorsal tentacles rather short, conical, yellowish 



