142 CONTRIBUTIONS TO CJiNADIAN PALAEONTOLOGY. 



Mackenzie River, at the '' Ramparts ;" Upper Devonian ; collector, 

 R. G. McConnell, 1888. Red Deer River, Lake Winnipegosis, J. B. 

 Tyrrell, 1889 ; Devonian (Cuboides zone); one specimen. 



This species resembles C. vermiculare, var, prcecursor, Freeh, from the 

 Upper Devonian rocks of Lake Winnipegosis and vicinity, but has a 

 more slender corallum ; the inner structure in the two species is some- 

 what similar, but in the Mackenzie River form the septa are stouter in 

 the peripheral area and the difference in length of the longer and shorter 

 septa, as seen in transverse section, is more marked. 



Oyathophyllum ellipticum. Hall and Whitefield. (Sp.) 



Ohonophyllum ( Ptyohophylhim) elHptieum, Hal) and Whitfield. 1873. Twenty-third 



Report, N. Y. State Museum of Nat. Hist., 

 p. 233, p. 23.?, pi. IX., fig. 13. 

 Oampophi/Uum Soetenicum, Sohluter. 1889. Anthozoen des rheinischen Mittel-Devon., 



p. 39, taf. III., figs. 1--6. 

 Oavipophi/llum elUpticum, Whitenves. 1891. Contr. to Can. Palseon., vol. I., pt. III., 

 p. 202, pi. XXVII, figs. 5 and 6, and appendix, p. 422. 



Corallum simple, conico-cylindrical, curved at the base and in older 

 specimens curved again above, but in the opposite direction. Surface 

 marked by strong encircling swellings of growth at irregular intervals, 

 and showing distinct longitudinal linear depressions, representing the 

 septa within. Epitheca smooth, with fine wavy transverse lines. A 

 diameter of 3 cent, is reached in a length of nearly 6 cent. ; the largest 

 specimen in the collection, one that has unfortunately been broken across, 

 not far below the bottom of the cup, has a maximum diameter of 5'5 cent. 

 Calyx large, with steeply ascending sides that expand rapidly near the 

 margin ; bottom of cup wide, flat, carinated almost to the centre by 

 septa ; depth somewhat less than the width of the cup at the bottom. 

 Septa numbering from about seventy to one hundred, of two orders, the 

 primaries meeting the tabulse and continued thereon to the centre of the 

 visceral chamber as carinse, the secondaries short, extending only about 

 •5 cent, inward from the outer wall. Tabulae well developed, generally 

 broader than the half diameter of the coral, flat, bent down at the edges. 

 Vesicles in the interseptal spaces coarse, of unequal size, forming a peri- 

 pheral dissepimental area of variable width. 



Localities. — Hay River, forty miles above its mouth, Mackenzie 

 District, R. G. McConnell, 1887 ; and Athabasca River, thirty miles be- 

 low Red River, R. G. McConnell, 1890. Devonian (Cuboides zone.) 



As Professor Calvin thinks that the Hay River fossil figured on plate 

 XXVII, fig. 5, of the first volume of the " Contributions to Canadian 

 Palaeontology," is not specifically identical with Chonophyllum ellipticum, 



