Corals, as is well known, form a large proportion of the fossils found in 

 the Palaeozoic rocks of Canada. Unfortunately, however, the classification 

 and nomenclature of these corals have long been in a state of some con- 

 fusion. With a view to remedying this, Mr. Lambe has, at Mr. Whiteaves's 

 suggestion, undertaken a revision of the genera and species. 



The present report on the Madreporaria Perforata and the Alcyo- 

 naria, with five plates, forms the first part of the fourth volume of " Contri- 

 butions to Canadian Palaeontology ". A second part, now in course of 

 preparation and to be illustrated by thirteen plates, is intended to 

 conclude the revision of this class so far as present material permits. 



GEORGE M. DAWSON. 



Geological Survey Department. 

 Ottawa, October, 1899. 



