( M ) 



VI. Description of some Shells found in Canada. By the Rev 

 Thomas Rackett, F.R.S. A.S.and L.S. 



Read June 1, 1819. 



HELIX ANGULATA. 



H. testa imperforata utrinque concava, anfractu primo utrin- 



que angulato. 



Tab. V. Fig. 1. 



Habitat juxta Lacum Huron. Testa diametri £ pollicis, trans- 

 versaliter striata, lutea, anfractibus 3 vel 4 contiguis. Aper- 

 tura ampla margin ata. 



HELIX monodon. 

 H. testa convexiuscula striata umbilicata, dente transversali, 



apertura lunata. 



Tab. V. Fig. 2. 



Testa diametro vix J pollicis cornea, anfractibus 6 rotundioribus. 

 Margo aperturse alba. Dens unicus transversalis, in anfrac- 

 tum. 



With these shells were likewise found Turbo fontinalis, Helix 

 palustris, a single valve of a thick Mya> the size of Mya picto- 

 rum, and two Bullas ; but being single specimens and much 

 worn and. bleached, I will not venture to pronounce them new 

 species. 



These 



