VITKINA. 
87 
produced. When first hatched, both the animal and 
shell were perfectly formed^ but the eyes were 
retracted into the body ; they are afterwards pro- 
truded. 
M. Moquin Tandon divides the French species 
into those in which the animal cannot withdraw it- 
self into its shell, as V. elongata, and those that can, 
as V, pellucida ; the latter cover themselves with a 
transparent epiphragm when in a state of torpidity. 
24. 1. Vitkina pellucida. Transparent Glass Bub- 
ble. — Shell green, depressed, hyaline and 
glossy ; whorls three, aperture somewhat oval, 
(t. 3, £21.) 
Helix pellucida. Muller^ Verm. 16.; Fenn^ B. Z. iv. 134. (?). — 
Helix Draparnaudi. Cuv. R. A, ii. 405. ; Yitrina Drapar- 
naldi. Leach., Syn. Moll, 5^. — Helix fuscescens. Gmelin., 
3639. — Helix diaphana. Poiret, Coq. Aisne., 77. — Helix 
uitida jun. A/ aS'aS. — Helix iimacoides. Allen, — 
Helix glaueina. Sheppard, Af^S'AS'. — Helix elliptica. Brown., 
Wern, Trans, ii. 523. t. 24. f. 8. (1819).- — Yitrina pellucida. 
Drop. ] 19. t. 8. f. 34 — 37.; Fleming., Phil. Zool. ii. t. 4. f. 1.; 
Alder., Trans. Newcastle., Mag. Z. and B. ii. 105.; Forhes 
and Hanley, B. M. iv. 30. t. 131. f. 8 — 10. t. 1 1 1. f. 2. — 
Helicolimax major. Ferussac, Essai, 43. —Yitrina major. 
Pfeiffer, L. and S. Moll. i. 47. — Limacina pellucida. P, 
Hartmann, N. Alp. i. 246. — Helicolimax Audebardi. Feruss, 
Tab. S. 21. H. Moll. t. 9. f. 5. — -Yitrina Miilleri. Jeffreys, 
Linn. Trans, xv. 326. — Yitrina Draparnaudi. Jeffreys, L. 
T. xvi. 326. — Helicolimax pellucidus. Ferns, Hist Moll. t. 
9. f. 6. — Helicolimax pellucida. Blainv. D. S. N xxxii. 
255. — Yitrina Audebardi. Pfeiffer, L. and S. MoU. ui. 55. 
— Helix limacoides. Allen, Syst. 85. t. 11. f. 20.— Yitrina 
membranacea. Brown, Ft. t, 40. f. 345. — Yitrinus pellu- 
cidus. Montf. ii. 239. — Yitrina diaphana; Yitrina depressa; 
Yitrina Dillwynii. Jeffreys, L. T. xvi. 326. — Yitrina elon- 
gata. Jeffreys, L. T xvi. 326. ; Tiirton, Man. ed. 1., not 
Drap . — Yitrina beryllina. Pfeiffer, 47. t. 3. f. 1. — Cobresia 
helicoides vitrea. Sluder. — Hyalina pellucida. Sluder. 
