264 THE DEVONIAN FOSSILS OF CANADA WEST. 
In those large ones, also, it is to be observed that the septa are of 
a nearly uniform size when seen in the upper part of the wall of 
the cup. 
There are several species of fossil corals in the Corniferous Lime- 
stone, which resemble this one in external appearance: 
1. Zaphrentis prolifica.—The greater number of the specimens 
are about the same size as those of C’. Zenkeri, but are more slender 
towards the base, seldom uniformly curved, the septa alternating im 
size in the walls of the cup, and the septal strie four in two lines. 
The worn specimens do not exhibit the roughened nodulose ex- 
terior presented by C’. Zenkeri when partially decorticated. 
2. Cyathophyllum Lesueurt.—This is a somewhat larger species, 
with the septa (just within the margin of the cup) distant nearly one 
line from each other, but with the septal strie as closely arranged as 
they are in C. Zenkeri; and further, under certain conditions, ex- 
hibiting ten striz to two lines. 
3. Zaphrentis cornicula.—(Edwards & Haime.) This species has 
not been found to my knowledge in Canada, but I have before me two 
specimens from Ohio (from Dr. Shumard.) The surface resembles 
C. Zenkeri, but then the septa inside of the cup are denticulated on 
their edges and, besides, are large and small alternately. Z. cornicula 
appears to be a Heliophyllum. 
4, Clisiophyllum Oneidaense.—The perfect specimens are marked 
with numerous sharp annulations, but when the outer surface has been 
worn away, the interseptal spaces exhibit either transverse diaphragms, 
nearly a line distant from each other, and turned upwards, or small 
projections similar to those of C. Zenkeri, but two or three times more 
distant. } 
Locality and formation. —Rama’s Farm, near Port Colborne. 
Collector.—E. Billings. 
CHONOPHYLLUM MAGNIFIcUM.—N., Sp. 
(See Plate I.) 
Description.—Short, turbinate, expanding to the width of six or 
seven inches at a height of four inches and a half; upper surface 
constituting a nearly flat circular disc, with a rounded cavity in the 
middle, one inch and a half wide, from which radiate one hundred 
and twenty-five depressed convex ridges ; the grooves between them 
