n6 



Thickness. 

 Feet. Metres. 



Niagara — 



Dark, thin-bedded bituminous do- 

 lomites 6 1-8 



The upper beds alone are fossiliferous, with 

 a predominance of corals, e.g. Favosites niaga- 

 rensis Hall, Heliophyllum sp., and Holy sites 

 catenulatus Linn. Indeterminable stromato- 

 poroids are also present in some abundance. Of 

 the Guelph gastropods, Coelocaulus biviltatus 

 Hall, is the most common; farther southward the 

 underlying Niagara beds increase in relative 

 thickness. 



Robert Kennedy's quarry (F) situated on 

 Waterloo avenue, shows a good exposure of 

 about 25 feet (7-6 m.) of irregularly bedded, 

 light coloured dolomite. The common fossils 

 are: — 



Favosites niagarensis Hall 



Halysites compacta Rominger 



Conchidium occidentale {Hall) 



Trimerella grandis Billings. 

 The large quarry of the Standard White Lime 

 Company is situated in more fossiliferous strata 

 than the other excavations near Guelph. On 

 entering at the southwest angle, many corals 

 are seen in a distinct reef, including: — ■ 



Favosites niagarensis Hall 



Pycnostylus guelphensis Whiteaves 



Halsyites catenulatus Linn 



Zaphrentis cf. racinensis Whitfield 

 Higher up and a little farther east, the above 

 corals are to be seen associated with numerous 

 stromatoporoids; the latter are nearly all in- 

 determinable, but the following species are the 

 more common: — 



Stromatopora galtensis {Dawson) 



Stromatoporella elora Parks 



Clathrodictyon striatellum {D'Orb). 

 The remainder of the fauna consists largely 

 of brachiopods and gastropods, with a small 

 number of cephalopods. The more important 



