﻿Canadian Stromaioporoids. 143 



1874, Ibid., ser. 4, vol. XIII., p. 8, 

 figs. 1, a-c: liep. Pal. Pro v. Ont., 

 p. 14, pi. 1, figs. 2 and 3, and 

 figs. 2, a-c, on p. 15 : and, 1887, 

 Ann. and Mag. Nat. Hist., ser. 5, 

 vol. XIX., p. 15, pi. 3, figs. 9-11. 

 Common in the Corniferous limestone at Ridgeway 

 and Port Colborne. Nicholson. 



B. Species of doubtful affinities, that have not 



YET BEEN EXAMINED WITH THE MICROSCOPE. 



(Camhro-Silurian species.) 



Stromatocerium rugosum. Hall. 



Stwmatocerium rugosum, Hall. 1847. Pal. N. York, vol. I., 



p. 48, pi. 12, figs. 2, 2, a-h. 

 Stromatopora rugosa, Billings. 1873. Geol. Canada, p. 140, 

 fig. 72. 

 According to Professor Hall, " this coral, so far as 

 known, is confined to the Black-river limestone, and to the 

 dark layers alternating with the Bird's-eye limestone." (op. 

 cit., p. 48). In the Province of Quebec, specimens of this 

 species were collected at Lake St. John, two miles west of 

 the Metabechouan River by Mr. James Richardson in 

 1857. In Ontario, specimens were collected at Paquette's 

 Rapids, on the Ottawa River, by Sir W. E. Logan in 1845 ; 

 at Balsam Lake, Victoria Co., by Mr. Alexander Murray 

 in 1853 ; and on Lot 13, Con. 4, of Stafford, by Mr. Richard- 

 son in 1853. In the "Geology of Canada" for 1863 the 

 species is recorded as occurring on the Moira River, 

 Hastings Co. ; in the township of Douro, near Peterborough ; 

 and on Lacloche Island, Lake Huron. The specimens are 

 usually silicified and their minute structure seems to 

 be obliterated. At Paquette's Rapids there are two 



