lambe ] CANADIAN PALAEOZOIC CORALS. 13 



evenly rounded above. A thin epitheca covers the lower part of the 

 corallum and extends for some distance up the branches. Within, the 

 corallites diverge obliquely outward and upward from an imaginary axial 

 line and terminate at right angles or rather obliquely to the surface ; they 

 are moderately thin walled throughout their length and polygonal in 

 section, but in some cases, the walls become quite stout. Calyces 

 unequal in size, generally with smaller ones dispersed between the larger 

 ones ; varying in diameter in the same specimen from 2 mm., or even 

 slightly more, to 1 mm. Pores not very numerous, of moderate size, in 

 one or sometimes two rows in the sides of the corallites. Tabulae hori- 

 zontal, complete. Inner surfaces of the walls bearing numerous, horizon- 

 tal, lamellar squamula? that project only a short distance into the coral- 

 lites. In the basal part of the corallum the outlines of the calyces are 

 clearly defined in the epitheca which is also roughened by irregular, 

 raised, horizontal ridges. 



Two specimens from Ontario show the low bushy shape of the corallum 

 well ; one is slightly over 7 cent, high, nearly 13 cent, broad with nine 

 main subdivisions which during life were apparently about to bifurcate ; 

 the other is nearly 11 cent, high, 16 cent, broad with about the same 

 number of stems or main branches, each of which subdivides two or three 

 times. 



Found in the Corniferous formation of Ontario, and of the Moose 

 River district. The specimens in the collection of the survey from Ont- 

 ario are from the township of Walpole, Haldimand county and from the 

 township of Wainfleet in the county of Welland. One specimen was 

 collected in 1888 by R. G. McConnell at the "Ramparts" McKenzie 

 River (Devonian). 



Favosites clausa, Rominger. 



Favosites elausus, Rominger. 1876. Geol. Sur. of Mich., Foss. Corals, p. 36, pi. XIV. 

 Favosites clausa, Nicholson. 1879. Pa'aeoz. Tab. Corals, p. 75, pi. TV., figs. 1 — lc. 

 Whiteaves. 1889. Contr. to Can. Palaeon., vol. I., pt. II., p. 121. 



This species is described by Rominger as consisting of " Clustered, 

 rapidly branching and anastomosing flexuous stems, varying from one- 

 half to one centimeter in thickness. Tubes unequal, the larger ones 

 circular, measuring in different specimens from one-half to one and a half 

 millimeter in diameter ; the smaller tubes filling the interstices between 

 the lar-er ones are subangular. Orifices at the ends of the branches all 

 open ; on the sides of the stems most of them are found closed by 

 opercula. Opercula flat or convex, some of them decorated with twelve 

 marginal carinse radiating toward the centre. Diaphragms partly simple 

 ■end regular, but largely intermingled with irregular partial septa, formed 



