""'^ ] CANADIAN PALAEOZOIC OOBALS. 153 



number, strictly confined to the extratabulate area, sharply carinated on 

 the sides and denticulated at the edge. Distepiments small, strongly 

 arched, occurring in five or six regularly ascending rows between the 

 septa at right angles to the downward curve of the septal carinas. Increase 

 by interstitial gemmation. 



This species differs from both C. quadrigeminum and C. Spenceri in 

 many essential points, but more particularly in having a well marked 

 tabulate area into which the septa do not extend. 



Localities. — Woodstock, Ont., A. Murray, 1866, Corniferous formation. 

 Long Portage of the Missinaibi River, R. Bell, 1877, Lake Manitoba, on 

 the east side of the Narrows, J. B. Tyrrell, 1888, and Dawson Bay, Lake 

 Winnipegosis, J. B. Tyrrell, 1889 ; Devonian (American Stringocephalus 

 zone). 



The specimens from these localities are beautifully preserved and show 

 almost every detail of structure. 



CyATHOPHYLLUM QUADRIGEMINUM, GoldfuSS. 



Plate XIl., figs. 6 and 7, 7a, 76. 



Cyathophyllum quadngeminum, Goldfuss, 1826. Petrefaota GermaniEe, vol. I., p. 59, pi 



XVIII., figs. 66, 6(! and pi. XIX., figs, la, 16. 

 M II Milne-Edwards and Haime. 1851. Polyp. Foss. des 



Terr. Palseoz., p. 383. 



Gyathophyllum arcticum, Meek, 1868. Trans. Chicago Acad, of Sciences, vol. I., p.. 79, 

 pi. XL, figs. 8, 8a, 86. 



Gyathophyllum quadrigemimv/m, Freeh, 1886. Die Cyathophylliden und Zaphrentiden 



des deutschen Mitteldevon, (Paloeontol, Abhandl.' 

 Dames und Kayser, vol. III.) p. 72, pi. III. (XV.) 

 figs. 1, la. 



Cyathophyllum arcticum, Whiteaves, 1891. Contr. to Can. Palseon., vol. I., pt. III., p. 199. 



Represented in the collection by two well preserved specimens that 

 show the general form of the corallum ; collected by R. G. McConnell in 

 1888 at the "Ramparts " on the Mackenzie River ; Devonian (Cuboides 

 zone). 



These two specimens may be described as follows : — corallum made up 

 of intimately connected, polygonal, generally hexagonal tubes that 

 diverge from a single basal corallite, the increase being apparently only 

 by interstitial gemmation, and form small masses, convex above and 

 obtusely pointed below ; larger specimen 8 cent, in breadth and 5 cent, 

 in height. Calyces on the upper convex surface. Lower surface covered 

 by a protecting epitheca striated by roughly concentric lines of growth. 

 Corallites unequal in size, varying in diameter from about 9 to 16 mm. in 

 the larger specimen and from 5 or 6 to 10 mm. in the other. In trans- 



