ONONDAGA LIMESTONE 
159 
1 and 1 a. Favosit.es fibrosa. 
1. Favosites fibrosa (Calamopora fibrosa , Goldfuss, Petrefiacta, pp. 82, 215, pi. xxviii, 
fig. 3 and 4, and pi. lxiv, fig. 9. Silurian Researches, p. 683, pi. 15 bis, fig. 6, 6 a to 6/). 
The figure represents a specimen of the natural size, being a portion of the whole, showing 
the manner of its bifurcations. 1 a, is a portion magnified, but the transverse lamella; are not 
visible. 
This fossil is abundant in many places upon the surface of the strata. It seems referable 
to this species of Goldfuss, though I have not been able to detect the connecting foramina; 
there are also some other varieties which I have no opportunity of examining. This species 
or a very similar one ranges from the Clinton group to the Hamilton. 
Locality —Clarence, Erie county. 
2. Astrea rugosa, n. s. The surface of this fossil consists of a series of circular or inter¬ 
rupted stars of about f of an inch in diameter, having an elevated disk in the centre of each, 
which is composed of 18 rays; these rays bifurcate on the outer margin of the disk, and 
form the 36 rays which compose the star. The rays are wrinkled, or crossed by concentric 
lamellae, giving the surface a peculiar roughness, from which the name is derived; it differs 
from any of Goldfuss’ figures in the number and character of the rays. 
Locality —Le Roy, Genesee county. 
2, Astrea rugosa. 
