164 HELICID^. 



tubercular), one central at the top, one at the top of 

 the outer angle, parallel Avith 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; 2)eristome 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 ivith 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 marginatii. 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, Almi. ed. 1.98. 

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

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

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

 Helix muscorum. MilUer, Verm. 105. ; Ferns. — Aljea 

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

 marginata. Hisso, 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 badla. 

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

 (Cochlodonta) muscorum. Pcrussac, Prod. r\. 475. — Buli- 

 mus muscorum. Brvg. 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. Bisso, E. M. iv. 89. 



Var. 1., mouth with the tooth obliterated. 



Under stones in dry pastures, and moist open 

 places, on calcareous soils. 



