﻿Canadian Stromatoporoids. 141 



Stromatopora. (Sp.) 



" Cfr. S. hucheliensis, Bargatzky, sp." Nicholson. 1891. Ann. 



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



p. 313. 

 According to Professor Nicholson (op. cit.) two speci- 

 mens collected by Mr. Tyrrell in 1889 from the 

 Stringocephalus limestone of two small islands in Dawson 

 Bay, Lake Winnipegosis, " have the general aspect of 

 Stromatopora hucheliensis, Barg. sp., and are probably 

 referable to this species. Unfortunately the specimens in 

 question are dolomitized, and their internal structure is so 

 far altered that this reference cannot be regarded as free 

 from doubt." 



Stromatopora. Sp. 



" Cfr. Stromatopora Hupschii, Barg., sp." Nicholson. 1891. 



Ann. and Mag. Nat. Hist., 

 ser. 6, vol. VII., p. 314. 



Lake Winnipegosis, at the south end of Snake Island 

 (one specimen), and on a small island on the south-east 

 side of Dawson Bay (one specimen) ; J. B. Tyrrell, 1889. 



In reference to these two specimens Professor Nicholson 

 observes (op. cit., p. 314) that they " belong to a species of 

 Stromatopora in many respects similar to S. Hilpschii, 

 Barg. Structurally they agree with the latter cojnmon 

 European arid British type, and differ from S. Bucheliensis, 

 Barg., in their coarse skeleton fibre, the lax reticulation of 

 the skeleton, and the loose spreading form of the 

 astrorhizse. The internal structure of these specimens is, 

 however, very poorly preserved, and it would be rash 

 to refer them unreservedly to S. Hilpschii." 



Stromatoporella granulata, Nicholson. 



Stromatoporella granidata, Nicholson. 1873. Ann. and Mag. 



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

 p. 94, pi. 4, figs. 3 and 3a ; and, 



