DORIS. 567 



8. D. ASPERA, Alder and Hancock. 



Doris aspera, Alder and Hancock, Annals of Nat. Hist. vol. ix. p. 32. 



Body (four-tenths of an inch in length) depressed, white 

 or yellowish, semitransparent. Cloak filled with spicula, 

 running in all directions, covered with large obtuse tuber- 

 cles, interspersed with a few smaller ones, not crowded ; 

 firm and rough to the touch. Dorsal tentacula long, 

 slender, white or yellowish. Branchiae consisting of nine 

 small, simply pinnate, transparent white plumes. Foot, 

 when in motion, extending beyond the cloak behind. 



Common among the rocks at Tynemouth, CuUercoats, 

 and Whitby (A. and H.). 



9. D. DiAPHANA, Alder and Hancock. 



Doris diapliana, Alder and Hancock, in Annals Nat. Hist. vol. xvi. p. 313; 

 and Monograph, part 2, fam. 1, pi. 10. 



Body (half an inch in length) oblong, rounded at the 

 extremities, rather convex, of a general pale yellowish- 

 white, very transparent. Cloak not ample, covered with 

 large clavate, rather distant, nearly equal tubercles, be- 

 coming more numerous towards the margin. Dorsal ten- 

 tacles linear, yellowish, inserted in smooth-edged sheathless 

 cavities. Oral veil ample, semicircular. Branchial plumes 

 eleven, simply pinnate, placed round a tuberculated area, 

 and partially retractile. 



It was taken by its describers at low water, Torbay. 



10. D. BiLAMELLATA, Limiasus. 



Doris hilameUata, Linnaeus Syst. Nat. — Johnston, Ann. Nat. Hist. vol. i. 

 p. 53. 

 „ fusca, MiTLLER, Zool. Dun. t. 47, f. 6-9. 



