366 



fhell, will find this defcription to accord with ours, when 

 it is obferved, Muller has apparently divided the na- 

 tural order of the teeth ; but it will be feen, the pair on 

 the inner angle of the outer lip, fland one on each fide, 

 the upper of which, is confidered by him as belonging to 

 the Columella, or in the vicinity of the volution. 



The irregular fliape of the aperture might alfo be con- 

 fidered by fome as a fub-fquare, but to us it appears 

 more properly fub-trilateral, with rounded angles. 



GEN. 



