164 
HELICID^. 
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-- 
gle 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. ; CJiemn. C. C. ix. 
f. 1076. — Pupa marginata. Drap. 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. Muller, Verm. 105. ; Ferus. — Alaea 
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 Brown). — Pupa badia. 
Adams, Boston, Jour. N. H. iii. 331. t. 3. f. 18. — Helix 
(Cochlodonta) muscorum. Ferussac, Prod. r\. 4J6. — Buli- 
mus muscorum. Brug. F. 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. 
Yar. 1., mouth with the tooth obliterated. 
Under stones in dry pastures, and moist open 
places, on calcareous soils. 
