146 CONTEIBUTIONS TO CANADIAN PALJBONTOLOGY. 



of the outer ends of the septa with the secondaries ; their free edges in 

 the calyces are denticulated and their sides carinated. Tabulae distinct, 

 flat, often slightly irregular indisposition, not quite one-half the diameter 

 of the corallites. Vesicles, between the tabulae and the wall, compara- 

 tively large, unequal in size, often intruding on the tabulse. 



Gyathophyllum ceeatites, Goldfuss. 



Gyathophyllum Ceratites, Goldfuss, 1826. Petrefacta ijermaniae, vol. 1. p. 57, pi. XVII., 



figs, 2a — h. 

 Cyathophyllum ceratites, McCoy. 1855. Brit. Palaeoz. Fossils, p. 70. 



M II Freck. 1886. Die Cyathophylliden und Zaphren'tiden des 



deutschen Mitteldevon (Palaeontol. Abhandl. , Dames und 



Kayser, vol. III. ) p. 64. 

 Cyathophyllum ccespitosum, Whiteaves. 1891. Contr. to Can. Palaeon., vol. I., pt. III., 



p. 200, pi. XXVII, figs. 7 and 8. (single corallites from- 



Hay Kiver. ) 

 Cyathophi/Uum dianthus, Whiteaves. (teste Freeh. ) 1892. Contr. to Can. Palaeon., vol. 



I., pt. IV., p. 264; (not the specimen from Lower Salt 



Spring, Red Deer River. ) 



To this species are referred seven simple coralites collected by Mr. R. G. 

 McConnell in 1887 from the Devonian rocks of Hay River, Mackenzie 

 District, forty miles above its mouth. The following description has'refer- 

 ence to these specimens, four of which have been slit to show longitudinal or 

 transverse sections : — corallum simple, conical when young, later becoming 

 cylindrical above, generally curved, sharply pointed below, marked by 

 annular, more or less decided, ridges and constrictions. Epitheca smooth, 

 with faint transverse lines of growth, but with scarcely any indication of 

 septal grooves. The largest of the conical specimens has a diameter of about 

 2 cent, and a length of 4 cent, measured along the convex curve, the 

 more cylindrical ones have a maximum diameter of less than 2 cent, 

 with a length varying between 6 and 8 cent. Calyx sometimes as 

 deep as wide, more often shallower, narrowing slightly toward the bot- 

 tom where it is flat or evenly concave. Septa from about fifty to seventy 

 in number, alternately long and short, the long ones almost reaching 

 the centre, thick near their outer ends, the short ones, stout, seldom more 

 than 2 mm. in length; their outer ends, when the epitheca is wanting, 

 appearing at the surfaces as strong costal ribs. Septa delicately denticu- 

 lated at their free edges and carinated on the sides, prominent and some- 

 times appearing to pass over the somewhat rounded margin of the calyx. 

 Tabulse numerous, close set, equal in breadth to about half the diameter 

 of the corallite, generally concave. Vesicles of the peripheral area, 

 enclosing the tabulse, rather large, unequal in size ; numerous, much 

 mailer vesicles occur between the costal ends of the Septa. 



