GEOLOGICAL SURVEY OF CANADA 



PALEOZOIC FOSSILS. 



VOL. III. 



2. Revision of the fauna of the Ouelpli formation oj Ontario, with 

 descriptions of a few new species. 



By J. F. Whiteaves. 



Since the first part of this volume was written, quite a number of 

 fossils from this formation have been acquired by the Survey, most of 

 which were collected by Mr. Joseph Townsend, of Toronto. Some of 

 these fossils are much better specimens than had hitherto been obtained, 

 of species that were already insufficiently characterized, others are new to 

 this formation in Ontario, and a few appear to have been previously 

 undescribed. Of late years particular attention has been given to the 

 collecting of natural moulds of the exterior of shells of gasteropoda, etc., 

 from this formation, as it has been found that gutta percha impressions 

 of such moulds often give much more information about the exact shape 

 and surface markings of the shell than can be derived from mere casts of 

 the interior. Quite a number of these natural moulds have recently been 

 obtained from a small exposure on the south bank of the Grand River 

 at Belwood, formerly called Douglas or Garafraxa, in the township of 

 West Garafraxa, seven miles north-east of Fergus. Several of the figures 

 on the plates which accompany this paper are drawn from impressions of 

 such moulds. These impressions were skilfully and most successfully 

 made by Mr. L. M. Lambe, to whom the writer is indebted for valuable 

 assistance in ascertaining the characters of some of the more critical 

 species which are neither enumerated or described in this Report. 



The publication of many special monographs and papers, and notably 

 that of Lindstrom's beautifully illustrated memoir "on the Silurian gas- 

 tropoda and pteropoda of Gotland,"* has thrown so much new light upon 

 the fossils of the Silurian (Upper Silurian) rocks, that it is now thought 

 practicable to attempt a revision of the entire fauna of the Guelph 

 formation as developed in Ontario, based not merely upon the new 

 material collected, but upon all the specimens in the Museum of the 

 Survey. 



*Kongl. Svenskavetenskaps-academiensHandlingar, Bandet 10, No. 6. Stockholm, 1884 



