838 E. Billings on the Potsdam Fossils. 
3. Mr. Bradley’s new specimens also show that there are three 
pairs of glabellar furrows, the anterior being represented by two 
small indentations just in advance of the points where the ocular 
ridges reach the glabella; and further that the course of the 
facial suture is the same as it is in C. striatus, (Emerich). The 
ygidium is more obtusely rounded than is represented in our 
igure 2. 
a to the correctness of the generic reference of this species 
Solenopleura, Eryx, Conocoryphe and Harpides should be placed 
in Conocephalites. In this view of Barrande’s, Angelin has con- 
‘ e genus has thus been greatly extended and judg- 
acters of the pleurse and hypostomat to which may be added the 
ocular ridge which although not a constant character in Cono- 
near allinity. 
* See Barrande’s “Paralléle entre les dépéts Siluriens de Bohéme et de Seandi- 
navie, p.19; and compare the tables on p. 17 and 85 of the same work, See also 
Angelin’s Palaontologia Scandinavica. 
+ See Barrande, “ Systéme Silurien du centre dela Bohéme,” p. 417-419. 
Montreal, 20th Sept., 1860. 
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