=■] 



CANADIAN PALiEOZOIC CORALS. 



95 



A number of specimens from the Birdseye and Black River formation 

 at Pakenham, Ont., and in the township of MoNab, Ont., show the coral- 

 lites, on a weathered surface, strewn about separately or in fascicles. Mr. 

 Billings referred these to T. fibratum and they are labelled as such in the 

 museum. The fossil in this state of preservation is very probably what 

 SafiFord named T. apertum ; the separation of the corallites of T. fihratum, 

 perhaps after the death of the colony, from each other, or the division of 

 the corallum into small bundles or fascicles of corallites might give a 

 result such as is found in these specimens. 



In the Geology of Canada, 1863, mention is made of Tetradium 

 fihratum as occurring in the Birdseye and Black River formation in the 

 vicinity of Montreal, Que. ; at Pointe Claire and Joliette, Que. ; at Les 

 Ecorchds, near Murray Bay, Que. ; at Vanluvin's Mills in Storrington 

 township, county of Frontenac, Ont., and in Loughborough township 

 of the same county ; in Marmora township, county of Hastings, Ont., and 

 on La Cloche, Thessalon and Campement d'Ours Islands, Lake Huron. 

 In the same report its occurrence in the Hudson River formation at Cape 

 Smyth, Lake Huron is referred to. 



The size of the corallites of specimens from the following localities are : 



Formation. 



Locality. 



Size of Corallites. 



Birdseye & Black) 

 River. 1 



L 

 Galena-Trenton 



Hudson River - 



Flanta^fenet township, Prescott county. 



J. Richardson, 1850. 

 McNab township, Renfrew county. J. 



Richardson, 1853. 

 Fakenham township, Lanark county. 



J. Richardson, 1853. 

 G-ravel Foint, St. Joseph's Island, Lake 



Huron. T. G. Weston, 1882. 

 West Shore Great Manitou Island, Lake 



Nipissing. A. E. Barlow, 1894. 

 Gloucester township, Oarleton county. 



W. R. Billings, 1895. 

 Pauquette's Rapids, Ottawa River 



Ottawa, O. T. C. Weston, 1886 



Fointe Claire, Que. N. J. Giroux, 1895 



East Selkirk, Man. J. H. Pauton 



Cape Smyth, Lake Huron. R. Bell, 



1859. 

 Cape Smyth, Lake Huron. R. Bell, 



1859. (Coated with Labechia. ) 

 Credit River, Streetsville, 0. J. B. 



Tyrrell, 1888. 



Over 4 to J of a line ; irre- 

 gular in size. 



to J of a line ; irregular in 

 size. 



Over ^ to J of a line ; irre- 

 gular in size. 



J to ^ of a line ; irregular 

 in size. 



4 to I of a line ; irregular 

 in size. 



Average J of a line ; rather 

 regular in size. 



Over \ to over J of a line ; 

 irregular in size. 



j^ to ^ of a line ; irregular 

 in size. 



J to ^ of a line ; irregular 

 in size. 



Not quite \ to J of a line ; 

 irregular in size. 



J to ^ of a line ; irregalar 

 in size. 



Average about J of a line. 



Average not quite ^ of a 

 line. 



Ann. and Mag. Nat. Hist. 5th Series, vol. XVIII. , p. 18. 1886. 



