198 MALACOZOA. GASTEROPODA. NUDIBRANCHIAf A, 



Doris Argo. Perm. Brit. Zool. iv. 43. PI. 22. f. 22. Doris tu- 

 berculata. Cuv. Mem. 23. PI. 2. f. 4. Doris tuberculata Lamk. 

 Syst. vi. 311. Doris tuberculata. Delle Chiaje, Anim. di Nap. iii. 

 134. PI. 38. f. 21. Doris Argo. Flem. Brit. Anim. 282. Doris 

 tuberculata. Johnst. Ann. of Nat. Hist. i. 50. PI. 2. f. 1, 2, 3. 



2. Doris obvelata. Veiled Doris. 



Body oblongo-elliptical, depressed, little convex above, and 

 covered with very small, unequal, much depressed, granulated 

 tubercles ; the margin of the mantle thin, somewhat un- 

 dulated, projecting far beyond the foot, rounded anteriorly ; 

 the foot oblong, broader before, with the margin repand ; the 

 two upper tentacula distant, mammilliform, rugoso-granulate ; 

 the two oral tentaeula thick, obtuse, near the mouth, the space 

 over which is roughish ; the branchial tufts numerous, bipin- 

 nate, circularly disposed on the hind part of the body above ; 

 the space between the edge of the mantle and the foot mi- 

 nutely granulate ; the genital organs terminating in a pro- 

 minent conical rugose papilla, in a cavity on the right side, 

 under the mantle-edge, at the anterior third of the length of 

 the body ; the colour pale yellow above, and of a lighter tint 

 beneath. Length an inch and a-half, breadth more than a 

 third of the length. 



The above description from a specimen found by Mr. Leslie 

 on the coast of Kincardineshire. 



Doris obvelata. Lamk. Syst. vi. 311. Doris obvelata. John 

 ston, Ann. of Nat. Hist. 52. 



3. Doris bilamelldta. Papillate Doris. 



Body oval, depressed, and covered with numerous unequal 

 diversiform papillae, generally hemispherical above, more 

 crowded and elongated toward the margins, somewhat de- 

 pressed at the anterior part ; the margin of the mantle thin, 

 slightly repand, projecting considerably beyond the foot, and 

 rounded at both ends ; the foot elliptical, with the margin 

 slightly waved, somewhat emarginate before, rounded behind ; 

 the two upper tentacula conico-acuminate, retractile into a 

 cavity, on each side of which is a tubercle, and minutely tuber- 

 culate or rugous; a short semicircular veil over the mouth, 

 somewhat crenate on the margin ; the mouth transversely ob- 

 long, small, close to the edge of the foot; branchial tufts 

 numerous, pinnate, disposed in a semicircle ; genital papilla 

 on the right side, at about a third of the length of the body ; 



