466 



Canadian Record of Science. 



E. 3 e, left valve, length 2^ mm, width 2^ mm., depth | mm. 

 E. 3 e, " " " 2 mm, " If mm., " ^ mm. 

 E. 3 e, right " " 2|- mm. " 2^ mm., " f mm. 

 E. 3 /, " " " 2 J mm. " 2 mm., " | mm. 



This species by its smooth surface and pointed form 

 recalls the genus Beyrichona of the Protolenus Fauna; 

 but it has not the broad flattened area, near the hinge 

 which marks that genus, on the contrary it is there most 

 prominent ; this feature belongs to the genus Schmidtella. 



•'From S.'^pervetus]this species is distinguished by its 

 finer ornamentation and pointed lower margin ; and from 

 >S'. camhrica of the Protolenus fauna by its smoother sur- 

 face and narrow fold at the cardinal line, ^o Silurian 

 Schmidtella has the pointed valve of this species." 



St. John, KB., Canada, 

 December, 1901. 



