152 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



Cyathophyllum coalitum, Rominger. 



Cyathophyllum coalitum, Rominger. 1870. Geol. Sur. Mich., Foss. Corals, p. 107, pi. 



XXXVIII, figs. 4. 

 Cyathophyllum confiaens, Hall. 1870. Illus. Dov. Foss., pi. XXVI, figs. 3, 4 and pi. 



XXVII. 



" Aetrseiform masses of very large, polygonal polyp cells measuring 

 about four centimeters in diameter, each one surrounded by its own com- 

 plete wall. Surface of calyces expanded, discoid, with an abrupt but 

 shallow central pit, the reversed bottom of which conically projects, cover- 

 ed by the central ends of the radial crests. Lamellie linear, subequal, 

 from sixty to seventy in the circumference of a calyx, crenulated by trans- 

 verse trabecule (bars), which are the ends of lateral, arched carina 

 decorating the side faces ; about fourteen carina on the length of one 

 centimeter. Interstitial spaces filled with vesicles arranged in arched 

 rows running diagonally across the carinations. Central area traversed 

 by transverse, larger plates, which are much intersected by the vertical 

 lamelhe. The structure of this coral is identical with Cyathophyllum 

 Hallii. from which it differs principally in its cespitose, compound growth. 

 Found frequently in silicified condition in the drift, connected with 

 fossils of the corniferous limestone ". (Rominger). 



Locality and Jormation. — Ontario ; Corniferous limestone. 



Cyathophyllum Anna, Whitfield. (Sp.) 



Cyathophyllum (Acervularia) Davidsoni, Whiteaves. 1879. Rep. of Pro^r. ss for 1877-78 



Gtol. burvty of Canada, p. 5 c. 

 Stylastrca Anna, Whitfield. 1882. Ann. New York Acad. Sci., p. 199; and 1890, ibid, p. 



520, pi. VI., figs. 1-5. 

 Cyathophyllum Anna, Whiteaves. 1892. Contr. to Can. Pakeon., vol. I., pt. IV., p. 260. 



In the original description of this species the corallum is described as 

 being " compound and growing in irregular or more or less hemispherical 

 masses of several inches in diameter, which are formed of a large num- 

 ber of closely aggregated polygonal cell tubes of rather small size." The 

 measurements of the Canadian specimens and their details of structure 

 are as follows : — corallites from about 5 to 10 mm. in diameter, generally 

 hexagonal in transverse section, rather unequal in size, Calyces avera- 

 ging about 5 mm. in depth, with steep sides, flat and smooth at the bottom. 

 Tabuhe smooth, presenting a somewhat vesiculous or blistered appear- 

 ance, forming a conspicuous and sharply defined axial area slightly less 

 than one-half the width of the corallite. Septa nearly of the same size, 

 though generally there is a sufficient difference in their length to allow of 

 the two orders being distinguished, from about twenty-eight to thirty-six in 



