164 HELICID^E. 



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 margi- 

 nal tubercle, and form a similar enclosure, and an 

 oblique one on the pillar; peristome flat, brown, 

 reflected, with a strong umbilicus behind the pillar. 



b. Peristome with a strong external rib, and a sin- 

 ale tooth in the hinder part of the mouth ; young 

 shell with a simple cavity. (Pupilla Leach.) 



72. 3. PUPA muscorum. Margined Chrysalis Shell. 

 Shell cylindrical, bald, shining brown ; whorls 

 five to seven, convex ; mouth roundish lunate, 

 with a single minute interior central tooth, and 

 a strong white external rib behind the outer 

 lip. (t. 7. f. 79.) 



Turbo muscorum. Linn. S. N. 1240.; Chemn. C. C. ix. 

 f. 1076. Pupa marginata. Drop. p. 61. t. 3. f. 36. 38. ; 

 Pfeiffer, 59. t 3. f. 23, 24. ; Brard, p. 93. t. 3. f. 15, 16. ; 

 Jeffreys, Linn. Trans, xvi. 358.; Turton, Man. ed. 1. 98. 

 f. 79. Pupilla marginata. Leach, Moll. Syn. 92. Turbo 

 chrysalis. Turt. Diet. p. 220. Pupa muscorum. Lam. 

 Hist. A. S. V. viii. 180. ; Rossm. Icon. i. f. 37., v. f. 323. 

 Helix muscorum. Mutter, Verm. 105. ; Ferns. Alsea 

 marginata. Jeffreys, Linn. Trans, xvi. 357. Jaminia 

 marginata. Risso, iv. 89. Pupa muscorum. Pfeiffer, iii. 

 61.?; Rossm. i. 83. t. 2. f. 37. r. f. 323. Turbo marginata. 

 Sheppard, Linn. Trans, xiv. 154. (not Broivri). Pupa badia. 

 Adams, Boston, Jour. N. H. iii. 331. t. 3. f. 18. Helix 

 (Cochlodonta) muscorum. Fernssac, Prod. n. 475. Buli- 

 mus muscorum. Brug. E. M. i. 334. Pupilla muscorum. 

 Beck, Ind. 84. Stomodonta marginata. Mermett, Moll. 

 Pyr. 53. Pupa unidentata. C. Pfeiffer, D. Moll i. t. 3. 

 f. 19, 20. Pupa bidentata. C. Pfeiffer, D. Moll i. t. 3. 

 f. 21, 22. Jaminia muscorum. Risso, E. M. iv. 89. 



Var. 1., mouth with the tooth obliterated. 



Under stones in dry pastures, and moist open 

 places, on calcareous soils. 



