276 



writer and Dr. P. E. Raymond obtained Paradoxides 

 forchhammeri from the Young Point beds. The finding of 

 this species, as pointed out by Dr. Raymond to the writer, 

 indicates that the measures belong to the highest of the 

 Middle Cambrian Paradoxides zones. 



The assignment of the Young Point beds to the upper 

 portion of the Middle Cambrian is of especial interest. 

 Prior to the recognition of Paradoxides forchhammeri, 

 Dr. Matthew on faunal and lithological grounds assigned 

 the Young Point beds to a horizon about in the middle of 

 the Etcheminian. The fauna of the Etcheminian and the 

 Coldbrookian as stated by Dr. Matthew [2, p. 72] are very 

 similar. It would appear therefore that in Cape Breton, 

 the oldest known Cambrian is not older than the Middle 

 Cambrian. As far as the evidence presented along the 

 line of section traversed goes, it would appear that the 

 Cambrian is altogether a sedimentary series and that the 

 so-called Coldbrookian is of Pre-Cambrian age. 



BIBLIOGRAPHY. 



1. Fletcher, Hugh. .. .Geol. Surv. Can., Note on the 



Sydney Coal Field, Cape Breton. 

 Map-sheets, Nos. 133,134 and 135. 



2. Matthew, G. F. .. .Geol. Surv. Can., Cambrian Rocks 



of Cape Breton, 1903. 



ANNOTATED GUIDE. 



GEORGE RIVER STATION TO ANTIGONISH. 



(G. A. Young.) 



Miles and 

 Kalometres. 



o m. George River Station — Alt. 37 ft. (11-2 m.). 



o km. From George River station the Intercolonial 



railway rUns eastward around the northern end 

 of the Boisdale hills, and keeping close to the 

 shores of St. Andrew channel, passes along the 

 foot of the western slope of the range of hills. 

 A short distance beyond George River station, 

 the railway enters an area of Cambrian strata 

 which form the western slopes of the hills. 

 The Cambrian beds extend as a comparatively 



