84 



Reviews — Canadian Geological Survey. 



II. — Canada Department of Mines, Geological Survey ; Museum 

 Bulletin No. 3, Geological Series No. 19. The Anticosti Island 

 faunas. By W. H. Twenhofel. 35 pp. and i pi. 30 October, 1914. 



Bulletin No. 4, Geological Series No. 20. The Crowsnest 

 volcanics. By J. D. MacKenzie. 37 pp. i pi. numbered as p. 37. 

 19 November, 1914. 



Bulletin No. 5, Geological Series No. 21. A Beatricea-\\ke 

 organism from the Middle Ordovician. By Percy E. Raymon d. 

 19 pp. pis. i-iv numbered as pp. 13-19. 23 November, 1 9 1 4. - '^" 



E BILLINGS' " Catalogues of the Silurian Fossils of the Island of 

 , Anticosti" were issued in November, 1866, and assumed 

 considerable importance in the history of North American Palaeozoic 

 palaeontology from the number of species therein described. It was 

 high time therefore for a renewed study of these beds and for their 

 correlation with the numerous divisions that have subsequently been 

 recognised both in North America and elsewhere. Dr. Twenhofel's 

 paper is preliminary to a memoir that will ultimately be issued by 

 the Geological Survey of Canada, and states his conclusions as follows : 

 (1) " Billings' statement that the section is complete from base to 

 summit and contains no stratigraphic break [although Billings admits 

 a palseontological break] is sustained." (2) [As a result presumably 

 of this completeness], "many of the species have ranges through 

 greater thicknesses than the same species have in other regions." 

 (3) There is a great difference between the faunas of the north and 

 south shores of the island, corresponding to lithologic differences 

 and hence to original differences of environment. (4) On the north 

 the rocks are shaly and sandy, on the south they contain more corals 

 and are more calcareous but not so thick. 



The various series and formation names are taken from a previous 

 paper by Schuchert and Twenhofel (1910) and are correlated as 

 follows : — 



System. Series. 



Formation. N. America. 



Britain. Norway, etc. 



Silurian. Anticosti. 



Chicotte. 

 Jupiter River. 

 Gun Eiver. 



Becsie River. 



Irondequoit. 

 Rochester. 



Clinton. 

 Cataract and 

 Brassfield. 

 Alexandrian. 



I Wenlock. 



/ Upper 

 Llandovery. 

 Lower 

 Llandovery. 



Etage 8. 

 Etage 7. 



Etage 6. 



Ordovician. Gamachian. Ellis Bay. 

 ,, Richmond. Charleton. 



,, ,, English Head. 



No equivalent. Upper Bala. I Etage 5. 



Richmondian \ 



of the 

 interior. 



J 



Middle Bala. } Borkholm. 



,, Utica. Macasty Shale. 



The following new generic and subgeneric names are proposed : 



' Palceofavosites, n.jr. of Favositidse ; Strophoprian or Strophnprion, 



n. s-g. of Strophonella (?, the genus is not stated) ; Virgiana, n.g. of 



