DORIS. 565 



speckled with brown. Oral tentacles linear. Branchial 

 plumes fifteen, tripinnate, arranged as a cup around the 

 brown tubular vent, retractile within a single cavity. 



Length one inch and a half or two inches. 



It lives near low water-mark, and has been taken on the 

 eastern and southern coasts of England, in the Irish Sea, 

 and in the Clyde district. 



4. D. cocciNEA, Forbes. 

 Plate Y, Y, fig. 2. 



Doris covcinea, Forbes, Rep. Brit. Assoc. Cork, 1843, p. 133. 



„ „ Alder and Hancock, Monog. part 4, fam. 1, pi. 7. 



Body of a bright scarlet, with minute black specks, 

 elliptic oblong, a little depressed. Cloak thickly covered 

 with very minute equal tubercles. Dorsal tentacles short, 

 stout, clavate, yellowish. Oral tentacles long, linear and 

 tapering. Branchial plumes small, ten, forming a complete 

 circle, retractile within a single cavity. Length half an 

 inch. 



On the coast of Cornwall, where it was first observed 

 by Mr. R. A. Couch (Alder). It ranges to the iEgean 

 (E. F.). 



5. D. PLANATA, Alder and Hancock. 



Doris pla/iata, Alder and Hancock, Ann. Nat. Hist. vol. xviii. p. 292. — 

 Monograpli, part 3, fam. 1, pi. 1. 



Body very much depressed, elliptic, reddish brown, 

 speckled and blotched with yellow and purplish brown. 

 Cloak ample, covered with unequal tubercles. Dorsal ten- 

 tacles subclavate, yellowish. Oral tentacles long, linear. 

 Branchial plumes seven, very small, fawn-coloured, with 

 dark specks, retractile within a single cavity. 



