220 #B. F. Shumard on the Primordial Zone of Texas, 
This species is closely related to C. Wisconensis Owen, specimens of 
which I have in my cabinet from the Potsdam sandstone of Lake Pepin, 
Wisconsin. The glabella is, however, proportionally shorter and the 
front border wider in the Texan fossil. 
Locality —Head of Clear Creek, Burnet county. Texas State Collec- 
tion. é 
Conocephalites Billingsi (n. sp.). 
The species is named in honor of E. Billin Palzontologist of 
tho Geological Survey of Canada. ag 
Dikelocephalus Remeri (n. sp.). 
Head approaching semicircular, obtusely subangular in front, having 4 
broad border, with a moderately elevated marginal rim, a groove just 
within the rim, and between this and the glabellar furrow a convex sur- 
face. Glabella convex, elevated, and, including the neck segment, occu 
pying not quite two-thirds the total length of the head; sides straight, 
slightly converging towards the front, which is moderately arched. The 
transverse furrows are distinctly marked and divide the glabella into mate 
o e posterior furrow is strongly arched backwards and extends 
quite across, joining the dorsal furrows a little behind the middle of the 
glabella. The anterior pair curve backwards, reach about one-third the 
distance across and are situated in advance of the middle, The do th 
bie are moderately jmpressed and distinctly limit the sides of the 
glabella. 
Pygidium short, having.a broad slightly excavated smooth border, 
whose outline is convex on the sides and slightly excavated behind, 
