DEVONIAN ROCKS OF CANADA 'WEST. 115 



on the lower side by a tliin projecting lip, but wben this lip is a little 

 worn, the aperture assumes a triangular form, one of the acute angles 

 pointing downwards. It is in this condition that the specimens are 

 usually found. This appears also to be a reticulating species. 



Locality and formation. — Kama's farm, and near Cayuga. Comi- 

 ferous limestone. 



Alteolites ceyptodens. — (Billings.) 



The only s{)ecimen of this species that I have seen is dendroid, the 

 stems three lines in diameter, and the bifurcations making an angle 

 of about seventy-five degrees. The cells open out very obliquely to 

 the surface, and are about one line distant, measuring from the centre 

 in a direction across the stem, but rather more than a line in the 

 longitudinal direction. In a transverse section of the branch of the 

 corallites, the tubes in or near the centre are not more than one-fourth 

 of a line in width, but they are twice that size at the mouth. Two 

 small tooth-like ridges occupy the inner surface on the side towards 

 the exterior, apparently half a line from the mouth or lower lip of 

 the cell. In some of the ceUs I think I can see a corresponding pro- 

 jection on the other side. The pores are also some distance within 

 the tubes, but are distinctly visible in two of the corallites. 



Locality and formation. — ^Eama's farm, near Port Colborne. 



Genus Sxeingopoea. — (Groldfuss.) 



Generic cTiaracters.— The fossils of this genus are fasiculated or 

 composed of large aggregations of long cylindrical corallites some- 

 what parallel to each other and connected by numerous smaller 

 transverse tubes. The exterior walls consist of a well developed 

 solid epitheca ; the cells circular ; radiating septa rudimentary ; trans- 

 verse diaphragms infundibuliform or placed one within another like a 

 series of funnels. 



About twenty species of this genus are known, and these are found 

 in the Upper Silurian, Devonian and Carboniferous formations. 



Steingopoea TTTBiPOEorDES. — (Tandcll and Shumard.) 



(Contributions to the Geology of KentiicTcy, page 8 ; ISil.) 



(M. Edwards and L. Haime, Poly pier sfossiles des terrains palmozoiques, p. 292.) 



This species is found in large masses of long slightly flexuoua 

 corallites. These have a diameter of about one line and a-half, and 



