>■] 



CANADIAN PALEOZOIC CORALS. 



95 



A number of specimens from the Birdseye and Black River formation 

 •at Pakenham, Ont., and in the township of McNab, 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 

 Safford named T. apertum ; the separation of the corallites of T. fibratum, 

 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 

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

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

 Ecorches, 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 : 



Birdseye & Black J 

 River. 1 



Galena-Trenton 



Hudson River \ 



Plantagenet township, Prescott county. 



J. Richardson, 1850. 

 McNab township, Renfrew county. J. 



Richardson, 1853. 

 Pakenham township, Lanark county. 



J. Richardson, 1853. 

 Gravel Point, St. Joseph's Island, Lake 



Huron. T. C. Weston, 1882. 

 West Shore Great Manitou Island, Lake 



Nipissing. A. E. Barlow, 1894. 

 Gloucester township, Carleton county. 



W. R. Billings, 1895. 

 Pauquette's Rapids, Ottawa River 



Ottawa, O. T. C. Weston, 1886 



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



East Selkirk, Man. J. H. Pan ton 



Cape Smyth, Lake Huron. R. Bell, 



1859. 

 Cape Smyth, Lake Huron. R. Bell, 



1859. (Coated with Labechia.) 

 Credit River, Streetsville, O. J. B. 



Tyrrell, 1888. 



Over \ to \ of a line ; irre- 

 gular in size. 



| to £ of a line ; irregular in 

 size. 



Over \ to \ of a line ; irre- 

 gular in size. 



\ to \ of a line ; irregular 

 in size. 



\ to \ of a line ; irregular 

 in size. 



Average \ of a line ; rather 

 regular in size. 



Over \ to over \ of a line ; 

 irregular in size. 



£ to \ of a line ; irregular 

 in size. 



\ to \ of a line ; irregular 

 in size. 



Not quite \ to \ of a line ; 

 irregular in size. 



£ to \ of a line ; irregular 

 in size. 



Average about \ of a line. 



Average not quite h of a 

 line. 



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



