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. 76. t. 6. f. 1. ; Forbes and Hanley, B. Moll. iv. 24. t. 
D D D. f. 3. ; Clark, Ann. Nat. H. xii. — Limax cinereus. 
Blainv. D., S. N. xxv. 430. — Milax gagates. Gray, Cat. 
Moll.B.M. 174. —-Limax (Amalia) gagates. Moq. Tand. 
Moll. Franc, ii. 19. t. 2. f. 1 — 3. 
Portland Island. {Mr. Darbyshire.^ 
Inhab. Isle of Portland; S. Wales^ near Tenby. 
Shield olivaceous blacky 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 somew^hat darker than the 
rest of the body ; mucus colourless. 
Very likely only a darker variety of the former. 
§ 2. Cochleophora.—Vtodij 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. Vitkina. (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. 
