la,, be] CANADIAN PALAEOZOIC CORALS. 135 



Cyathophyllum Euryone, Billings. 

 Plate XL, figs. 1, la, lb. 



Cyathophyllum Euryone. Billings. 1862. Palaeoz. Foss., vol. I., p. 110. 



" " Billings. 1866. Cat. Sil. Foss. of Anticosti, p. 34. 



" Turbinate, curved at the base, expanding to a diameter of one inch at 

 the height of from one to one and a half inches, then becoming cylindri- 

 cal ; radiating septa about one hundred ; cup with a flat or gently convex 

 bottom, which is in width about half the whole diameter ; inner area full 

 half the whole width, with flat or convex tabulae ; outer area with the 

 cells ascending in lines which meet the exterior at an angle of about 45° ; 

 the vesicles acutely oval, from one to one and a half lines in length, with 

 a thickness of one-third or one-half a line. Surface, in a worn specimen, 

 strongly sulcated by the septal strne, of which there are four or five in 

 one line." (Billings.) 



Locality. — " The Jumpers," Anticosti, in division IV., of the Anticosti 

 group; collected by J. Richardson, 1856. 



Cyathophyllum articulatum, Wahlenberg. 

 Plate X., figs, 9, 9a, 9b. 



Madrcporites articulatus Wahlenberg. 1821. Nov. Act. Soc. Upsal., vol. VIII, p. 87. 

 Cyathophyllum articulatum, Milne- Edwards and Haime. 1851. Polyp. Foss. des Terr 



Palseoz., p. 377; and 1855, Brit. Foss. Corals, p. 282, pi. 



LXVII.,figs. 1,1a. 



Lambe. 1899. Ottawa Naturalist, vol. XII., p. 219. 



" To this species are assigned a number of specimens from the Niagara 

 rocks of Lake Temiscaming ; their general fcrra, manner of growth and 

 structure may be described as follows : Corallum composite, fasciculate, 

 with upright, slightly flexuous, subparallel corallites, increasing by 

 lateral or by marginal calicular gemmation from an initial basal parent, 

 and forming clusters reaching a height of over 20 cent, and of 

 variable breadth. Corallites subcylindrical, strongly expanded and con- 

 stricted at unequal intervals with generally free thin margins to the ex- 

 pansions, coming together and adhering to each other where enlarged, of 

 unequal size, the young corallites often proceeding upward with little in- 

 crease in diameter, at other times rapidly gaining breadth ; varying in 

 diameter from about 5 to 20 mm., the largest being sometimes slightly 

 over 20 mm. in diameter. Outer surface covered by an epitheca with 

 numerous slight rings of growth and with strongly marked septal fur- 

 rows. Septa, tabuhe and dissepiments well developed. Septa number- 

 ing from sixty to over seventy in the large corallites, of two alternating 



