below and the Queenston shales above. In the same report he correlates the 

 "red and green sandstones, shales and marls," which have since become the 

 Queenston, with the Medina of the New York geologists. In the report of the 

 Geological Survey of Canada for 1863, the Credit river is again mentioned. 

 The rocks outcropping in its bed are referred to the Hudson River group, and 

 on the authority of Billings the names of two or three fossils, including the 

 abundant species Favositella stellata (Columnaria alveolata), are given. In the 

 report upon the ' 'Palaeontology of Ontario," which appeared in the years 1874 

 and 1875, Nicholson describes certain species of fossils from the Credit River 

 rocks, which he includes in the Hudson River group. 



Dr. W. A. Parks next described the Ordovician section on the Credit river 

 in a short article in Guide Book No. 5, issued by the Geological Survey of Canada 

 at the time of the Geological Congress in Toronto in 1913. He refers the rocks 

 in part to the Richmond and in part to the Lorraine, listing a few species from each 

 formation. The first mention of the prominent coral reef at Streetsville is 

 made in this article, although corals were among the fossils from the Credit 

 river listed by Billings and Nicholson. 



The only other work of importance appeared in Memoir No. 83 of the 

 Geological Survey of Canada. In this memoir, Dr. A. F. Foerste gives an 

 account of the stratigraphy and paleontology of the rocks at Streetsville, 

 naming the fossils which he found and giving their position and range in the 

 section. He did not find any distinctive species in the coral reef, but it was his 

 opinion that these rocks are contemporaneous with the Gore Bay reef on Mani- 

 toulin island, which is referred with greater certainty to the Whitewater or 

 Saluda of Ohio and Indiana. He found Strophomena varsensis which he listed 

 as Strophomena sulcata, Strophomena planumbona erindalensis listed as 

  Strophomena planumbona, and Catazyga headi at the base of the cliff northeast 

 of the home of William Crozier, and he correlates this part of the section with 

 the Waynesville of Ohio, a conclusion which finds support in this paper. Between 

 this level and the coral reef, he found other species, chiefly pelecypods, which 

 are also suggestive, of the Waynesville. Below the former level he found 

 nothing diagnostic. He did not find any indication of the Liberty, which is 

 not surprising, for the establishment of the Streetsville member {vide postea) 

 with relationship to the Liberty is based entirely on bryozoan remains, and 

 Foerste records only two species of bryozoans from the whole Credit River 

 section. 



Outline of Stratigraphy. — The classification given below of the Ciricinnatian 

 strata in the vicinity of Toronto is founded on observations by Professor Parks 

 at Toronto and by the writer on the Credit river. 



