99 



Pupilla marginata. Leach, Mollusc, p. 127. 

 Turbo Chrysalis. Turt. Diet. p. 220. 



Shell the tenth of an inch long, brown or yellowish 

 horn-colour : spire composed of six or seven 

 rounded and slightly striate volutions : aperture 

 semicircular, with generally a small tubercular 

 tooth placed in the middle and deep within tlie 

 mouth, but which is sometimes very obscure and 

 often totally w^anting : peritreme thin, not mar- 

 gined, but slightly reflected and forming an urn-' 

 bilicus ; and behind the outer lip is a thick whi'te 

 rounded rib. 



Under stones, in pastures near the sea. 



80. Pupa edentula. Shell conic-oval, with five or 

 six volutions : aperture semicircular, without tooth ; 

 the peritreme simple, without margin or rib : um- 

 bilicus minute. 



b. more elongated and cylindrical. 



Pupa edentula. Drap. p. 59. t. 3.f. 28, 29. 



Shell the tenth of an inch long, horn-colour, trans- 

 parent, slightly striate : spire composed of five or 

 six rounded and deeply divided volutions : aper- 

 ture with a very thin margin, without the rib behind 

 the outer lip. 



h2 



