252 



It mud be remarked, that moft turbinated univalve fhells, 

 when firft produced, have few voluiionSj and their apex 

 abrupt, fwelhng into a round knob : even the common 

 garden fnail. Helix ajperfa, is Co different in its infant 

 ftate, as to have been confidered a diftinil: fliell: great 

 care is therefore requifite in difcriminaiing the minute 

 fpecies. 



We have always reje61ed thofe whofe ^j6^a; was glcbofe, 

 and deltitute of a finiflied fpire. 



GEN. 



