Grammysia canadensis BillinLTs 



Page 2JI 



13 A charactci'islic left valve 



CJaspj sandshvic. Gaspe Basin 



Mytilarca nitida Billinj^s 



14, 15 Left ami ri^ht \alves in the form of limestone casts 

 Grande Grcvc liiiicstonc. Grande Greve 



Liopteria ? 



P;>se 



16 A left \al\e of tloubtful \-alue. x \]/i 

 Gaspc sandstone. Gaspe Basin 



299 



