181 



remarkable of which is that of the termination of the 

 lower whorl being quite detached from the base of 

 the shell. The aperture ovate, or rounded; its edge 

 entire, and the margin reflected outwards. These 

 shells are terrestrial, fusiform, slender, and the summit 

 rather obtuse, to which may be added, though not 

 mentioned by Lamarck, that the opening is occa- 

 sionally dentated. 



Clausilia torticollis 



truncatula 



retusa 



costulata 



corrugata 



inflata 



Clausilia teres 



denticulata 



collaris 



papillaris 



plicatula 



rugosa. 



i 



BULIMUS. 



HELIX OVATA. Muller. 



Da Bois' catalogue of the Bligh Collection, pi. 2. 



Of this beautiful genus, the shells of which are all terres- 

 trial, some were blended by Linnaeus with the G, Bul- 

 la, and others with the G. Helix, from which they es- 

 sentially differ, never being of an orbicular shape. 

 The animal has a great resemblance to that of the He- 



