202 CONTRIBUTIONS TO CANADIAN PALAEONTOLOGY. 



Cyathophylltim Athabascense. (N. Sp.) 

 Plate 32, tigs. 1, la, b. 



Corallum simple, elongate-turbinato and slightly curved : epitheca 

 well developed, marked with rounded and not very prominent longitu- 

 dinal ribs, which are much broader than the grooves between them, 

 and by transverse striic or wrinkles and an occasional constriction 

 caused by an arrest of growth. Calyx circular, rather deep, with steep 

 sides : septa about thirty four in number, simple, not bearing arched 

 carinaj on their sides and apparently not denticulated at their summits. 

 Interior structure, as seen in longitudinal sections, consisting of an 

 outer or peripheral zone of oblique ascending rows of rather large 

 vesicles, and of a broad central area in which the interstices between 

 the septa are crossed by largo curved dissepiments, whose size, shape 

 and disposition are very irregular. Transverse sections made a little 

 below the base of the calyx show that the thirty four septa extend 

 almost to the centre, and that they are all equal in length. 



Athabasca River, three miles below the Calumet, R. G. McConnell, 

 1890 : three good specimens. 



The largest of these is strikingly similar in shape and in surface 

 markings to the Cyathojihyllum ceratites of Goldfuss as figured by the 

 Sandbei'gers on plate xxxvii of their memoir on the fossils of the 

 Devonian rocks of Nassau, but in C. ceratites there aro said to be fi'ora 

 sixty to one hundred and twenty subdenticulated septa. 



Campophyllum elliptioum. 



Plate 27, figs. 5, 6. 



Chonophyllum (Ftychophi/Uum) ellipticum, Hall and Whitfield. 1873. Twenty- 

 third Rep. Reg. N. York. St. Cab. Nat. Hist., p. 233, pi. ix- 

 fig. 13. 



Hay River, forty miles above its mouth, R. (r. McConnell, 1887: 

 three specimens, each of which has been slit longitudinally through 

 the centre and the cut surfaces polished. 



On treating in the same way a specimen of a coral from the Devonian 

 shales at Rockford, Iowa, recently forwarded for comparison by Dr. II. 

 G. Griffiths of Burlington, in that State, and labelled by him Ohono- 

 phyllum, ellipticum, the writer was sui-prised to find that its internal 

 structure and external characters are essentially the same as those of 



