DORIS. 85 



British Museum, sent from Torbay by Mrs. Griffiths. The 

 species comes nearest to D. Johnstoni, but is sufficiently dis- 

 tinguished from it by the form of the tubercles, and by the 

 number and character of the branchial plumes, which lie over 

 on the back and are interrupted behind, while those of D. 

 Johnstoni form a complete erect circle. 



5. D. testudina'ria, Risso. 



D. testudinaria, Kisso, Hist. Nat. de l'Eur. Mer. iv. p. 33, f. 15. D. pla- 

 nata, A. & H. Brit, Nud. Moll. fain. 1, pi. 8. (young). 



Body ovate, or broadly elliptical, rather flat : mantle large, 

 expanded, variegated with chestnut-brown and pale yellow, 

 and covered with very unequal, soft, warty tubercles ; under- 

 side lemoncoloured, spotted with brown : dorsal tentacles cla- 

 vate, stout, yellowish : oral tentacles linear : gills 8, tripinnate, 

 mottled with brown and white, forming an incomplete circle 

 behind, and retractile within a large cavity. L. 2. 



Habitat : Within tide-marks, Isle of Herm (G. S. Brady and 

 Hodge) ; in shallow water, Lamlash Bay (Alder) ; and near 

 Cumbrae, Firth of Clyde (Robertson). [Falmouth (Cocks); 

 Nice (Risso and Verany)]; Adriatic (Grube); ^Egean (Forbes).] 



The examination of further specimens of different sizes from 

 the Clyde district proves that D. planata, of the ' British 

 Nudibranchiate Mollusca,' is the young of D. testudinaria. 

 In its young state it is extremely flat, and the gills imperfectly 

 developed. 



6. D. Johnsto'ni, Alder and Hancock. 



D. obvelata, Johnst. in Ann. N. H. 1st ser. i. p. 52 (non Miiller). D. 

 Johnstoni, A. & H. Brit. Nud. Moll. fam. 1, pi. 5. 



Body ovate-oblong, yellowish-white or yellow, sometimes 

 approaching to orange, with a few minute brown spots : mantle 

 covered with minute, close-set, pilose tubercles : dorsal tentacles 

 clavate, rather short and stout, brownish, with the margin of 

 the cavities a little raised and serrated : oral tentacles linear : 

 ijills 15, tripinnate, forming a complete cup. L. 1*75. 



