Geology and Mineralogy. 225 
is a canine; and in other points the dentition shows Theriodont 
characters This fossil has been described by Dr. Leidy under the 
name of Bathygnathus borealis. Thus, supposing the affinities 
of the fossils from the Ural and Prince-Edward Island to be cor- 
rectly determined, the Reptilia distinguished by Mammalian char- 
acters are shown to have had a very wide range. Further, the 
author thinks that the Theriodont reptiles of the Bristol dolomitic 
land.—Mr, Howley’s labors in Newfoundland during 1874 were, 
try between the Bay of Islands and St. George’s Bay. He has 
: r. Mu a sic rocks ee to Blaff Head, 
and finds that they pass unconformably over different horizons of 
rocks which are taken to represent the Sillery and Levis subdivi- 
“ons of the Quebec group of the Lower Silurian system. The 
