﻿Cryptozoon and other Ancient Fossils. 207 



in the same paper to appear in the calciferous of Philips- 

 burgh on the Canadian frontier. Prof. Seely informs me 

 in a private letter that he has since recognized in the 

 Champlain Valley what appear to be two additional 

 species of Cryptozoon. 



Cryptozoon Boreale, Dawson (Fig. 1). — A quite distinct 

 and very interesting species was obtained in 1888 by Mr. 

 E. F. Chambers, of Montreal, at Lake St. John, P.Q., asso- 

 ciated with fossils of Trenton age. It consists of a mass 

 of cylindrical or turbinate branches, proceeding from a 

 centre and also budding laterally from each other. Each 

 branch shows a series of lamime concave upward. The 

 spaces between the thin laminas are filled with a very fine 

 granular material, in which are canals, less frequent 

 straighter and more nearly parallel to the lamina^ than in 

 the typical species. This species is remarkable for the 

 slender and coral-like shape of its branches, for its 

 resemblance in general form to the disputed specimens 

 resembling Eozoon from the Hastings (probably Huronian) 

 of Tudor, Ontario, and on account of its being the latest 

 known occurrence of Cryptozoon. It was very shortly 

 described and commented on in the " Canadian Eecord 

 of Science " for 1889. 



Cryptozoon Occidentale, S.N. — So far our specimens of 

 Cryptozoon have been Upper Cambrian or Ordovician, but 

 Dr. C. D. Walcott, in his memoir on the Fauna of the 

 Lower Cambrian, mentions at p. 550 that in the Grand 

 Caiion section in Arizona, there are unconformably under- 

 lying the Lower Cambrian " 12,000 feet of unaltered sand- 

 stone, shale and limestone," which may be regarded as 

 Pre-cambrian, and probably in whole or in part represent- 

 ing the Kewenian of Lake Superior and the Etcheminian 

 of Southern New Brunswick. In these beds, 3,500 feet 

 below the summit of the section, he found " a small Patel- 

 loid or Discinoid shell," a fragment probably of a Trilobite, 

 and a small Hyolithes, in a bed of bituminous limestone. 



