92 DORIDID^. 



Mr. Howse upon Cellepora pumicosa, from the deep-water 

 fishing-boats, Northumberland. [Arcachon (Fischer).] 



19. D. pusilla, Alder and Hancock. 



1). pusilla, A. & H. in Ann. N. H. 1st ser. xvi. p. 313; and Brit. Nud. 

 Moll. fam. 1, pi. 13. 



Body broadly ovate, depressed : mantle fulvous, thickly 

 covered with dark-brown spots and numerous conical tuber- 

 cles : domed tentacles slender, tapering, white, with strong- 

 distant laminse : head-veil undulating, slightly bilobed : gills 

 9, snow-white, stout and obtuse, set in a rather open circle. 

 L. 0-3. 



Habitat : Under stones at extreme low- water mark in the 

 " Gentlemen's Cove," Torquay, rare (Alder); Burghead (Mur- 

 ray). [Falmouth (Cocks).] 



20. D. sparsa, Alder and Hancock. 



D. sparsa, A. & H. in Ann. N. H. 1st ser. xviii. p. 294 ; and Brit. !Nud. 

 Moll. fam. 1, pi. 14. 



Body oval, yellowish-white, depressed : mantle spotted with 

 fulvous-brown, and with distant, roundish, obtuse tubercles : 

 dorsal tentacles tapering, white, blotched with brown, thinly 

 laminated, and with three or four large tubercles surrounding 

 the base of each : head-veil broad, arched : gills 9, small, dull 

 white, set in a rather open circle. L. 0*25. 



Habitat: On Cellepora pumicosa from the fishing-boats, 

 Cullercoats (A. Hancock). 



A single specimen only of this rare species was obtained. 

 In form and markings it comes near to D. depressa ; but it is 

 at once distinguished from it by the character of the tubercles. 

 In the latter respect it comes nearer to D. inconspicua, from 

 which it differs in the shape and less numerous laminae of 

 the tentacles, and in the large tubercles at their base, as 

 well as in the colour and markings of the cloak. [Faroe 

 (Morch).] 



