RETORT OF THE STATE PALEONTOLOGIST 1902 ' 949 



In Europe, this zone (or zones) occurs in the Tremadoc of 

 Wales and (he Tremadoc and Ceratopyge beds of Norway 

 (Brogger) and Sweden (Tullbtrg). It is Upper Cambrian (as 

 British geologists receive the term), and is probably represented 

 in the West by a part of the Calciferous series of New York and 

 western Canada. It is distinctly older than tbe graptolitic mass 

 of the Point Levis beds. N\,t one of its forms has hitherto been 

 figured from the Quebec group. It may occur at Point Levis, 

 if the Calciferous is represented there. T*Ws is a point for future 

 discovery to settle. In the meantime, however, n will be better 

 to refer to the zone as the " Cape Rosier zone." Like the Levis 

 'Calciferous conglomerate beds, its fauna is made up of genera, 

 partly Cambrian and partly Ordovician (i. e. partly Primordial 

 and partly Cambro-Silurian). 



The Cambrian age of the Dictyonema-bearing Barrasois river 

 beds of Cape Breton island is demonstrated by their included 

 Olenidae. The Dictyonema beds of Gaspe" and M6chin can not 

 be far above this Cape Breton zone. It is exceedingly probable, 

 therefore, that, as in Cape Breton, the Dictyonema beds lie not 

 far removed from the unconformable base of the fossil-bearing 

 'rocks of the district. 



From further statements of the same author it can be con- 

 cluded that he was averse to paralleling definitely the Cape 

 Rozier zone with any formation of the New York series; for 



instance, in the summing up on page 174, we find under Cam- 

 bric formations : 



B 1 Fine conglomerates . . . and black slates (of Shick- 

 ' shock range). 



B 2 Gray, red, brown and black shales with beds and bands 

 of dolomite (Localities: Les Islets, coast south of Cape Rosier, 

 etc). Fossils: Dictyonema, Bryograptus, etc. To this is added 

 (B 1 and B 2 may, perhaps, represent both the Upper Potsdam 

 and the Calciferous rocks of the western district of New York 

 and central and upper Canada.) 



In the table on page 183, the zone has been divided into two 

 subzones, as follows: 



B Dictyonema sociale zone (A). Shales of Cape 

 Rosier, Little Whale river, Grand Me'chin point, with Bryo- 

 graptus sp., Staurograptus, Clonograptus, Dictyonema 

 sociale Salt. 



Dictyonema zone (B). Shales of Barrasois river, Cape Breton 

 Island, with Dictyonema sociale Salter, and Olenidae. 



Dr Matthew's untiring and enthusiastic geologic investiga- 

 tions have -Fatter on led to the discover v of the Dictvonema zone 



