﻿142 Canadian Record of Science. 



1886, Mon. Brit. Stromatop., 

 pt. 1, pp. 93, 94, pi. 1, figs. 4, 5 

 and 15, pi. 4, fig. 6, and pi. 7, 

 figs. 5 and 6 : also, 1891, Ibid., 

 pt. 3, p. 202, pi. 26, fig. 1. 

 Hamilton formation at Arkona and near Thedford, 



Ontario. According to Professor Nicholson (Mon. Brit. 



Stromatop., p. 203), this species has been found only 



in the Hamilton formation and S. Sehvynii in the Corni- 



ferous. 



Stromatoporella Selwynii, Nicholson. 



Stromatoporella Selwynii, l:sichohon. 1892. Mon. Brit. Stro- 

 matop., pt. 4, p. 205, pi. 1, fig. 

 14, and pi. 26, figs. 2-4. 

 " Not uncommon in the Corniferous limestone of Port 

 Colborne, Ontario." Nicholson, op. cit., p. 205. 



Stromatoporella incrustans. Hall and Whitfield. (Sp.) 



Stroynatopora (Cosnostroma) incrustans, Hall and Whitfield. 



1873. Twenty-third Kep. Pteg. 



N.Y. St. Cab. Nat. Hist., p. 



227, pi. 9, fig. 3. 

 Stromatoporanulliporoides, Nicholson. 1875. Kep. Pal. Prov. 



Ont., p. 78. 

 Stromatoporella incrustans, Nicholson. 1891. Ann. and Mag. 



Nat. Hist., ser. 6, vol. VII., 



pp. 309 and 310, footnote. 

 " Hamilton formation at Arkona, and Corniferous lime- 

 stone, at Port Colborne, Ontario." Nicholson. It is also 

 abundant in the neighborhood of Thedford, Ontario, in the 

 Hamilton formation. 



Stromatoporella (?) tuberculata, Nicholson. 



Stroniatopora tuber cidata, Nicholson. 1873. Ann. and Mag. 



Nat. Hist., ser. 4, vol. XII., 

 p. 92, pi. 4, figs. 2 and 2a: 



