352 



Transactions. 



List of Tertiary Mollusca obtained in the Trelissick Basin, 

 arranged for purposes of comparison. 



The numbers at the heads of the various columns correspond with the 

 following localities : — 



1. Tuff beds interstratified with marls, Coleridge Creek. 



2. Lower tuff beds, Porter Eiver, just above the limestone gorge. 



3. Lower tuff beds, Broken River, just below the limestone gorge. 



4. Upper tuff beds, junction of Thomas River with Porter River. 



5. Tuff beds, below limestone, Whitewater Creek. 



6. Shell bed, at rock fall in Porter River. 



7. Sandy beds between the two gorges of the Porter River and in the 



Thomas River near its junction with the Porter (according to 

 Hutton) ; also specimens collected by the author in beds of similar 

 position in a tributary on north side of the Whitewater River. 



(The suffix /* indicates that Hutton is responsible for the record of the 

 occurence of the species in the locality.) 



