12 



Leptaena rhomboidalis (Wilckens). 

 Orthis flabellites Foerste. 

 Orthis cf. davidsoni de Verneuil 

 Platystrophia biforata (Schlotheim) . 

 Rhipidomella hybrida (Sowerby). 

 Rhipidomella cf. circulus (Hall). 

 Schuchertella cf. subplana (Conrad). 

 Whitfieldella sp. 

 Trilobita — 



Acidaspis sp. 



Calymmene niagarensis Hall. 

 Encrinurus cf. punctatus Wahlenberg. 

 Encrinurus sp. 



In addition to the above there is a considerable 

 number of forms of doubtful determination, including 

 several gastropods related to Eotomaria, Loxonema, 

 Trochonema and Platyostoma, also a large species of Ortho- 

 ceras. 



4. The basal sandstone of the Cataract formation may 

 be seen beneath the limestones a short distance along the 

 road. A few fossils may be observed on the surface of 

 some of the sandstone slabs, but they are all of very 

 doubtful determination. Gastropods and pelecypods are 

 by far the most abundant. 



5. The underlying red shales o the Richmond, 

 destitute of fossils, may be observed in the bed of the 

 creek. 



Credit Forks Section. 



The line of old quarries which extends along the north 

 side of the ravine of the Belfontain branch affords an 

 excellent opportunity for collecting Cataract fossils. It 

 is interesting to note that the narrow Whitfieldella zone 

 referred to in the section at Cataract may also be recog- 

 nized here. 



The basal Cataract sandstone, at this point, was 

 quarried in large quantities formerly, but the increasing 

 overburden has compelled the cessation of operations. 

 A large proportion of both the grey and he brown sand- 

 stone used for building purposes in Toronto has been 

 obtained from these quarries. 



