12 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



Favosites Canadensis, Billings. (Sp.) 



FistuUpora Canadensis, Billings. 1858. Rep. of Progress for 1857, Geol. Survey of 

 Canada, p. 165 ; and 1858, Canadian Naturalist, vol. III., p. 420 ; 

 also 1859, Canadian Journal, new series, vol. IV., p. 98, fig. 1. 

 Calamopora Canadensis, Rominger. 1862. Am. Jour. Soi. and Arts, 2nd series, vol. 



XXXIV., p. 397. 

 -FistuUpora Canadensis, Nicholson. 1874. Palaeon. of Ont., p. 63. 

 Favosites Canadensis, Rominger. 1876. Geol. Sur. Mich., Foss. Corals, p. 29, pi. 

 VIII., fig. IV and pi. XV., fig. 3. 

 n „ Whiteavea. 1889. Contra, to Can. Palseon., vol. I., pt. II., p. 121. 



Corallum forming large spreading masses with an undulating or 

 irregularly nodular upper surface and a concentrically striated epitheca 

 covering the basal portion ; frequently 3 or 4 inches in thickness and 1 

 foot in diameter. In the most typical specimens there is a differentia- 

 tion of the corallites into comparatively large rounded or almost circular 

 tubes, at an average distance of about 4 mm. apart, and smaller prismatic 

 tubes in the intervals. In portions however of the same specimens the 

 •difference in the shape and size of the two forms of corallites may be less 

 apparent or may disappear altogether, whilst in some individuals prismatic 

 corallites, having an average diameter of about 1 mm., alone occur ; the 

 circular corallites are from 1 to nearly 2 mm. in diameter. Pores small, 

 about '17 mm. in diameter, close together, about -33 mm. apart vertically, 

 in one, two or three rows in the sides of the corallites. Tabulae horizon- 

 tal, entire. Squamulse abundant, of the usual tongue-like shape, passingi 

 to the centre and frequently combining to form pseudo-tabulae. 



Found in the Oorniferous limestone of Ontario. According to Romin- 

 ger this coral has at times a " digitato-ramose or reticulated growth with 

 orifices on all sides of the stems." 



Favosites cebvicoenis, Milne-Edwards and Haime. 



Favosites eervicornis, Milne-Edwards and Haime. 1851. Polyp. Foss. des Terr. Palaeoz., < 

 p. 243. 

 If II Milne-Edwards and Haime. 1855. Brit. Foss. Corals, p. 216, pi. 



XLVIII., fig. 2. 

 II 11 BiUinga. 1859. Canadian Journal, new series, vol. IV., p. 110, \ 



fig. 9. 

 ,11 11 Nicholson. 1874. Palseon. of Ont., p. 52. 



? Favosites arhuseula, Hall. 1876. lUus. Dev. Foss., pi. XXXVI., figs. 1—9. 

 -Paehypora eervicornis, Whiteaves (pars). 1891. Contr. to Can. Palason., vol. I., pt. 

 III., p. 206. 



Corallum with rather short, stout, bifurcating, cylindrical branches; 

 growing upward from a stout base or rising independently from a common, 

 almost lamellar base ; the branches are often somewhat compressed laterally 

 in their upper portions, sometimes rather globose or thickened, and are 



