HELICID^. 195 



first whorl of the shell formed. This would lead to 

 the conclusion that the animal is viviparous. The 

 same has been observed to be the case with several 

 other terrestrial shells, as Bulimus decollatus, Achatina 

 octona, and some Carocollce, as C. bicolor. 



66. 2. PUPA anglica. English Chrysalis Shell, (t. 7. 

 f. 82.) Shell ventricose, shining, bald, fulvous; 

 whorls five; aperture elongate-lunate, five- tooth- 

 ed; the peristome flattened and reflected; um- 

 bilicus cylindrical. 

 Vertigo anglica. Ferussac, Mollusc. ; Turton, Man. 



ed. 1. f. 82. 

 Pupa tridentalis. Michaud, Compl 61. 1. 15. f. 28. 



30. ? 

 Pupa anglica. Potiez an d Michaud, Gall. i. 195. t. 



20. f. 1. 2. 



Turbo anglicus. Wood, Cat. Supp. t. 6. f. n. 

 Pupa ringens. Jeffreys, Linn. Trans, xvi. 356. 



bidentata. Pfeiffer, i. 59. t. 3. f. 21, 22. 



Inhab. woods, north of England, Northumberland, 

 Lancashire. 



Animal dark lead-coloured, white beneath. 

 Shell two lines long, and half as much broad, dark 

 chocolate-brown with often a greyish cast, especially 

 towards the point, opake, faintly striate longitudinally; 

 spire composed of six or seven slightly raised volu- 

 tions ; aperture semielliptic, with a tubercular pro- 

 jection near the top of the outer lip, and five teeth, 

 two at the base, one of them small and tubercular, 

 one central at the top, one at the top of the outer 

 angle, parallel with and united to the peristome, 

 curving so as nearly to meet the marginal tubercle, 

 and form a circular enclosure ; and an oblique one on 



K2 



