PUPA. CLAUSILIA. 31 



whorls seven^ flattish ; aperture pear - shaped, 

 curved, and narrower at the upper and outer 

 angle ; the peristome thickened and obtuse ; um- 

 bilicus imperfect ; aperture with three teeth, one 

 above, and one on each side. A variety of this 

 shell has two additional denticles alternating 

 with the larger one. ^. B. Azeca Matoni of 

 Turton, 52. 



CLAUSILIA. TERRESTRIAL. 



Sinistral, generally fusiform, slender; summit some- 

 what obtuse; aperture irregular, rounded, oval; 

 margins united, free, and externally reflected, 



C. PAPILLARIS. Reversed, fusiform, pellucid, 

 most minutely striated, brownish horn-colour ; 

 sutures margined with a brown line, crenulated 

 with white spots ; aperture two-plaited, /g • T. 

 56. 



C. PLicATULA. Reversed, fusiform, striated, 

 reddish brown ; columella with four or five plaits, 

 two of which are more conspicuous, -i^. B. 

 T. 54. 



C. RUGOSA. Reversed, slender, elongated, 

 acute, striated ; chocolate-brown ; aperture two- 

 toothed ; margin of lip white, and reflected, /g* 

 B. T. 58. 



C. BiDENS. Elongate, fusiform, sub-ventri- 

 cose, solid, sub -striated reddish horn -colour; 



