1899J Lambe — Canadian Paleozoic Corals. 251 



appears not to have been noticed previously in species of this 

 genus and which is well shewn in some specimens of P. Billingsi 

 in the collection is apparently somewhat analagous to that 

 which is seen in some species of the genus Arachnophyllum. 



Locality and formation. — Corniferous formation of Ontario ; 

 Indian Cove, Gasp^, in the Gasp^ limestone, No. 8 (Oriskany 

 formation), collected by R. Bell in 1862 ; also three loose speci- 

 mens from the Devonian area south of Hudson Bay, collected by 

 R, Bell in 1877 at Long Portage, Missinaibi River to Moose 

 Factory. Of the Long Portage specimens onfe has corallites 

 of average size but the other two have corallites and calicinal 

 pits that are considerably larger than those of specimens usually 

 assigned to this species ard approach in size those of the smalle^ 

 forms of P. Billingsi. Measurements taken from the two last 

 mentioned specimens give the following results — diameter of 

 calyces from 17 to 20 mm., diameter of central pits 6 or 7 mm. 

 In all three specimens the septa number from about forty to 

 forty-four and the pore-openings can be detected in natural 

 transverse sections. 



Mr. Whiteaves records* the occurrence of this species in 



the Hamilton formation on the authority of Mr. Schuchert who 

 collected a good specimen of it at Bartlett's Mills in 1895, 



Chonophyllum nymphale, Billings, sp. 



CyatJiophylluni nymphale, Billings. 1862. Geol. Surv. Canada, 

 Palseoz. Fossils, vol. I, p. ill. 



Corallum simple, short, broadly expanded, cincave on the 

 lower surface, convex above ; dimensions of the type and only 

 specimen known, height at centre 4 cent., breadth about 9 cent. 

 Basal surface apparently provided with an epitheca. Calyx 

 shallow, convex at the centre, with broadly expanding reflexed 

 margins exhibiting about eighty low, rounded septal ribs that 

 increase in breadth outwardly. In a radial section a central area 

 about I cent, in breadth, is disclosed ; it is made up of small 

 slightly convex plates arching upward and inward so as to form 



*Geol. Surv. Canada, Contr. Canad. Palasont., vol. I, pt. v, p. 365. 



