375 



neither of these genera have yet been reported as occurring above the 

 Chazy in Canada or New York. The general aspect of the trilobitic 

 fauna of this series of strata seems to me to be more like that of the 

 Pleta limestone of Russia, and Angelin's two Swedish groups, B C and 

 C, than it is to that of any of the American Lower Silurian formations 

 heretofore illustrated. 



The second formation, above mentioned, consists of the 700 feet of 

 black shales with grey and white limestone conglomerates, at Cow Head. 

 In no other part of Newfoundland do we meet with the remarkable fauna 

 which characterizes the LeVis formation. It undoubtedly occurs here in 

 full force. The following list contains the species collected at that local- 

 ity, and also shows how many of them occur in Canada : 



