343 



Page 119. 



Line fourteen from top, for "p. 3," read — p. 111. 



Page 121. 

 Line twenty from hottom, for "p. 18," read — p. 168. 



Page 122. 



For " Pleueotomaeia bicincta. Hall. (Sp.) " read : — 



LOPHOSPIEA BICINCTA, Hall. (Sp.) 



And add to the references : — 



Lophospira bicincta, Ulricli and Scofield 1897, Geol. and Nat. Hist. Surv. Minn., 



Final Rep., vol. III. pt. II, p. 964. 



Page 128. 



For " Chkieueus Icaeus, Billings." read : — 



Ceeaueus Icarus, Billings. (Sp.) 

 And, to the list of trilobites from the "Lower Beds" at Stony 

 Mountain, add the following : — 



Pteeygometopus callicephalus. Hall. (Sp.) 

 A well preserved and nearly perfect cephalon, collected by Professor J . 

 Hoyes Panton in 1884, and now in the Museum of the Survey. 



Part IIL 

 Page 151. 



Line two from top, for " regularity," read — angularity. 



Page 152. 



For " DiPHYPHYLLXJM Stokesi, Edwards and Haime. (Sp.)" read : — 

 CoLUMNAEiA Stokesii, Edwards and Haime. (Sp.) 



In 1900, in the second part of his " Revision of the Genera and Species 

 of Canadian Palaeozoic Corals " (Contr. Canad. Palseont., vol. IV) Mr. 

 Lambe expressed the opinion that the specimens from Lower Fort Garry 

 that were referred to D. Stokesi, are identical with the Paloeophyllum 

 rugosum of Billings, and that they should be called Columnaria rugosa. 

 Three years later (in the second fasciculus of the " Palseontologia Univer- 

 salis," p, 29 d) Dr. Walcott says that there " seems to be no doubt that 

 Columnaria Thomi, Hall, and Diphyphyllum Stokesi, Whiteaves, are 

 species of Cyathophyoides, " which, it may be added, is probably not gene- 

 rically distinct from Columnaria. If, however, the specimens from Lower 

 Fort Garry are identical with the " Lithostrotion Stokesi " of Milne- 

 Edwards and Haime, from Lake Winnipeg, it would seem that they 



