60 Canadian Record of Science. 



in it describes under the name of Asthenodonta Westoni, a large 

 species of Carboniferous mollusc whose affinities and structure 

 show a strong resemblance to the genera Anthracoeia, Plagiodon 

 and Unio. 



Mr. Whiteaves briefly and succiently reviews the literature of 

 shells whose affinities and habitat have caused them to be referred 

 to the Unionidae and allied forms in Palaeozoic and later times. 



Choffat, Douvill£, D'Orbigny, S. P. Woodward, Forbes, Sowerby, 

 Phillips, Hibbert and Brown, in Europe have written on this 

 subject, while Meek, Vanuxem, Hall, Sir Wm. Dawson and others 

 in America have written on the same subject. 



This species was discovered by Mr. Weston during the summer 

 season of 1893, and named in his honour by Mr. Whiteaves. It 

 may be stated here that from the same horizon at the same locality 

 Sir William Dawson has obtained a large number of trunks of trees 

 containing remains of microsauria, molluscs and insects. 



H. M. Ami. 



