I3i 



Leptaena rhomboidalis (Wilckens) 

 Rhynchotreta cuneata americana Hall 

 Spirifer crispus (Hisinger) 

 Spirifer niagarensis {Conrad) 

 Spirifer radiatus Sowerby 

 Trematospira camura (Hall) 

 Whitfieldella nitida Hall 

 Whitfieldella nitida oblata Hall 



Brow of the Niagara cuesta, showing Lockport dolomite, Hamilton, Ontario. 



2. Rochester Shale. — The lower and more shaly beds of 

 the Rochester shale are rich in fossils among which 

 brachiopods and, more particularly, bryozoans abound. 

 These beds are also noted for rare cystids and 

 crinoids, although with the exception of Caryocrinus 

 ornatus and Stephanocrinus angulatus, these remarkable 

 forms are but seldom encountered. The following list 

 contains the more common species from these beds: — 

 Corals — 



Enterolasma caliculus (Hall) 

 Favosites cf. parisiticus cf. niagarensis Hall 

 Hydrozoans — 



Dictyonema retiforme Hall 

 Crinoids — 



Eucalyptocrinus coelatus (Hall) 

 Herpetocrinus brachiatus (Hall) 

 35065— 9 1 



