262 THE DEVONIAN FOSSILS OF CANADA WEST. 
the cup is equal to one-fourth or one-third of the whole length of 
the coral. In small specimens, the margin of the cup is thin and 
‘sharp; but in the large ones rounded, and one line or a little more 
in thickness. About one-half of the radiating septa reach the 
centre, and form a small rounded elevation on the bottom of the 
cup. ‘There is a septal fossette on one side, which, in all the speci- 
mens I have seen, reaches the centre. ‘The surface exhibits a few 
sharp constrictions of growth, with rounded annulations between 
them, the latter often abruptly terminated on their upper sides. In 
very perfect specimens, fine encircling striz of variable size, appa- 
rently from eight to fifteen in the width of one line. The horizontal 
strie, which indicate the number of the septa, are distinctly visible, 
but not strongly marked. The position of the septal fossetite is in- 
dicated on the outside of the cup by two septal ridges, which extend 
the whole length of the coral, and constitute one of the lines along 
which the younger septa were added from time to time. 
The greater number of the specimens are from six to nine lines in 
length, but some are full one inch. The width of the cup is always 
a little less than the length of the entire fossil. The most common 
number of septa is sixty. The arched striw and spines are not often 
preserved. 
Locality and formation—Rama’s Farm, near Port Colborne. 
Corniferous Limestone. 
Collector.—H. Billings. 
CYATHOPHYLLUM ZENKERI.—N. Sp. 
Fig. 11. 
Fig. 11. Cyathophyllum Zenkeri.—Side view of a large specimen. 
Deseription.—Corallum simple, turbinate, strongly curved at the 
pointed base, gently and uniformly arched above, gradually enlarging 
