PALEOZOIC. 



PELECYPODA. 



CAEBONIFEEOUS. 



CABBONIPEEOUS. 



GASTEROPODA. 



SPECIES. 



Province, Odontophoea. 

 Class, aASTEUOPODA. 



Haliotid^. 



Pleurotomaria Defrance, 1824 



— Yotmgiana Armst 



a 



BEPEEENCES. 



Trans. Geol. Soc. Glasgow, vol. ii, p. 75, t. 1, f. 8. 



461 



