COCHLEOPHORA. 85 



lar or shagreened, with a deep marginal groove ; 



back keeled the whole length from the back of 



the shield to the tail. 



Limax gagates. Drap. H. Moll. 182. t. 9. f. 1, 2. Ferussac, 

 Hist. 75. t. 6. f. 1. ; Forbes and Hanlep, B. Moll. iv. 24. t. 

 D D D. f. 3. ; Clark, Ann. Nat. H. xii. — Limax cinereus. 

 Blainv. D., S. N. xxv. 430. — jNIilax gagates. Gray, Cat. 

 Moll. B. M. 174. — Limax (Amalia) gagates. Moq. Tand. 

 Moll. Franc, ii. 19. t. 2. f. 1—3. 



Portland Island. (Mr. Darhyshire.^ 



Inhab. Isle of Portland ; S. Wales, near Tenby. 



Shield olivaceous black, with paler sides ; head 

 bluish; tentacles darker, the upper deep violet; 

 shield ample, squarish, bilobed behind, granulated, 

 of the same colour as the rest of the body ; general 

 colour very deep olive or olivaceous black, becoming 

 lighter on the sides, so that the margin of the foot 

 is very pale, except near the heel, where it is darker, 

 sole nearly white ; keel somewhat darker than the 

 rest of the body ; mucus colourless. 



Very likely only a darker variety of the former. 



§ 2. Cochleophora. — Body and shell more or less 

 spiral, prominent on the middle of foot, 



* Mantle produced, front forming a kind of anterior 

 shield, hinder part of the edge elongate and partly 

 covering the shell ; shell polished. (Vitrinina.) 



2. ViTRiNA. (Bubble Shell.) 



Animal : Body rather elongate, lanceolate ; mantle 

 subanterior, produced into a rugose shield in 

 front, with a central spiral prominence, pro- 

 tected by a thin, transparent, rather depressed, 



G 3 



