196 PNEUMONOBRANCHIATA. 



the pillar; peristome flat, brown, reflected, with a 

 strong umbilicus behind the pillar. 



b PUPILLA Leach. 



Peristome with a strong external rib, and a single tooth 

 in the hinder part of the mouth ; young shell with a 

 simple cavity. 



67. 3. PUPA marginata. Margined Chrysalis Shell, 

 (t. 7. f. 79.) Shell cylindrical, bald, shining 

 brown; whorls five to seven, convex; mouth round- 

 ish lunate, with a single minute interior central 

 tooth, and a strong white external rib behind the 

 outer lip. 



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.; Tur- 

 ton, Man. ed, 1. 98. f. 79. 



Pupilla marginata. Leach, Mollusc, p. 127. 



Turbo chrysalis. Turt. Diet. p. 220. 



Pupa muscorum. Lam. 



Helix muscorum. Mutter, Verm. 105.; Ferus. 



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



Jaminia marginata. Risso, iv. 89. 



Pupa muscorum. Pfeiffer, iii. 61.?; Rossm. i. 

 83. t. 2, f. 37. and 323. 



Turbo marginata. Sheppard, Linn. Trans, xiv. 

 154. ; not Brown. 



Var. 1. Mouth with the tooth obliterated. 



Under stones, in dry pastures, and moist open places. 



Animal grey-black. 



Shell the tenth of an inch long, brown or yellow- 

 ish horn-colour; spire composed of six or seven 

 rounded and slightly striate volutions ; aperture semi- 

 circular, with generally a small tubercular tooth 



