18 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



occupied by corallites of smaller size but of the usual shape. Pores 

 rather large, about *33 mm. in diameter, from 1 to 1*5 mm. apart verti- 

 cally and in a single row in the sides of the corallites. Tabulae horizon- 

 tal, complete ; squamulae present in small numbers and of the usual 

 shape. 



This species approaches most nearly to Favosites Canadensis, Billings, 

 of the Corniferous limestone, from which it may be easily recognised 

 principally by the small size and characteristic shape of the coral lum, by 

 the smallness of the corallites and by its having rather large pores in 

 single rows as well as by the comparative fewness of the squamuise. 



Abundant in the Hamilton formation of Ontario. 



Favosites Alpenensis, Winchell. 



Favosites Alpenensis, Winchell. 1866. Rep. Lower Pen. of Michigan, p. 88. 



Favosites Hamiltonensis, Rominger. 1876. Geol. Sur. Mich., Foss. Corals, p. 27, 



pi. VII., figs. 3 and 4. 

 Favosites Hamiltonice, Hall. 1876. Illus. Dev. Foss., pi. XXXIV., figs. 1—9. 

 Favosites Gothlandica, Whiteaves (cfr. F. Billingsii, Rominger, and F. Hamiltoniae, 

 Hall). Contr. to Can. Palaeon. vol. I., pt. IV., p. 272. 



Corallum massive, irregular in shape, attaining sometimes a diameter 

 of about 1 foot with a height or thickness of 4 or 5 inches. Corallites 

 prismatic, unequal in the same specimen, varying from 1 to 2*5 mm. in 

 width. Pores of moderate size, about "25 mm. in diameter, occurring 

 generally in one row, though sometimes in two rows in the sides of the 

 corallites. A slightly raised margin is seen round many of the pores 

 but this is evidently not a constant character as very frequently the 

 edges of the pores are quite plain or even slightly depressed when 

 weathering would not account for the change. Tabulae complete, hori- 

 zontal, at times slightly concave or convex ; frequently exhibiting margi- 

 nal depressions. Squamulse few in number, rather small, narrow and 

 rather short, extending only a short distance into the corallites. Inner 

 surface of corallites faintly striated longitudinally. 



This species is distinguishable from other Devonian Favosites principally 

 by the size of the corallites whose sides have most frequently only 

 one row of pores and by the fewness and small size of the squamulse as 

 well as the large number of well developed tabulae. 



Found in the " Middle Devonian * " of Lakes Winnipegosis and 

 Manitoba. 



Western shore of Dawson Bay, Lake Winnipegosis, J. W. Spencer, 

 1874, one specimen (loose) and at Whiteaves Point, Professor J. Macoun, 



