Fauna of St. 

 John group 

 in New 

 Brunswick. 



Regional 

 names of the 

 Cambrian 

 strata in New 

 Brunswick. 



10 



Thus the following faunas of trilobites and graptolites were found 

 in the St. John group, which comprises the Divisions 1, 2 and 3 

 indicated above. 



Division 1. 



b. Fauna of Protolenus (not known in Europe). 



C i 



7 > Various sub- faunas of the Lower Paradoxides beds. 

 d. j 



Division 2. 



No trilobite faunas were found. 

 Division 3. 



a. Fauna of Parabolina. 



b. Fauna of Peltura. 



c. Fauna of Dictyonema (graptolite). 



d. Fauna of Tetragraptus (graptolite) and the trilobite Cyclogna- 



thus. 



The fauna of Protolenus, not known in Europe, is found in New 

 Brunswick and Newfoundland, below Paradoxides, but the other 

 faunas follow the same succession in Europe. It also became clear 

 from these discoveries that the uppermost part of the St. John group 

 was not Cambrian but Ordovician, or Lower Silurian, and that the 

 recognizable Cambrian part terminated with the Dictyonema fauna, 

 but included that of Protolenus. 



The faunas of both b and c in Division 3 had already been found in 

 Cape Breton, so there was a reasonable hope that, in the underlying 

 part of the Cambrian in that island, the faunas of the corresponding 

 portion of the St. John group would be found on further study of the 

 field and this hope has in part been realized. 



As the faunas and the lithological succession of the several divisions 

 of the St. John Group did not agree in all respects with the European 

 Cambrian it was thought advisable in 1 890 to give them local names, 

 and hence : 



Division 1, in which the first characteristic Cambrian fauna was 



found was called Acadian, 

 Division #, which is very fully developed in the city of St. John, 



was called Johannian, and 

 Division 3, whose faunas were first distinguished in Cape Breton, 



was named retonian.* 



*Trans. Roy. Soc. Can., vol. viii, sec. iv, p. 129, 1890. 



