﻿l:'.6 Canadian JRccord of Science. 



Elora by Mr. David Boyle in 1880, and at Durham by ^Ir. 

 Joseph Townsend in 1884. 



Stro.matupora ANTigUA, Nicholson and Murie. 



Pachystroma antiqua, Xicholson and Murie. 1878. Journ. 



Linn. Soc, ZooL, vol. XIV., p. 224, 



pi. 4, tiers. 2-5. 

 Stromatopora antiqua, Xicholson. 1886. Mou. Brit. Stroma- 



top., pt. 1, p. 17. pi. 5, figs. 8-11, 

 The types of this species were collected by Professor 

 Xicholson from the Xiagara limestone at Thorold, and 

 there is a single specimen in the Museum of the Geological 

 Survey at Ottawa, which was collected from the Guelph 

 formation at Durham, by Mr. Townsend in 1884. 



Stromatopora Galtexsis, Dawson. (Sp.) 



Camostroma Galtense, Dawson. 1875. Life's Dawn on the 



Earth, p. 160: and, 1879, Quart. 



Journ. Geol. Soc. Lond., vol. XXXY., 



p. 52. 



Stromatopora Galtensis, Xicholson. 1891. Mon. Brit. Stro- 



matop., pt. 3, p. 173. 



Hespeler, T. C. AVeston, 1867 : one specimen. Professor 



Xicholson, who has examined a portion of this specimen, 



says (op. cit.) that its minute structure "is practically 



destroyed by dolomitization, but all its general characters 



would lead to the belief that it is very closely related to 



Stromatopora typica, Piosen, and is probably identical with 



it." He further states that Cccnostroma coiistellatum of 



Spencer, from the Xiagara limestone near Hamilton, does 



not appear to be in any way distinguishable as regards its 



general characters from C. Galtense, Dawson, and that he 



is " strongly disposed to think that it is really identical 



with S. typica, Eosen. If the above view should prove to 



be correct, then Cmnostroma Galtense, Dawson, and C. 



