Maryland Geological Survey 505 



forms, making thus with the occipital furrow and the lateral margins 

 scalene areas. (3) The genal angle is somewhat more acute. (3) The 

 third side-lobes bear each a small node on the distal ends. 



Occurrence. — Oriskany Formation, Eidgely Member. Cumberland. 



Collection. — Eobert H. Gordon. 



[Ohern.'J 



Subgenus CORYCEPHALUS 



Dalmanites (Corycephalus) dea^tatus Barrett? 



Plate XCIII, Fig. 4 



Dalmanites dentata Barrett, 1876, Amer. Jour. Sci., 3d ser., vol. xi, p. 200, pL 



Dalmanites dentata Barrett, 1876, ibid., vol. xii, p. 70. 



Dalmanites (Corycephalus) dentatus Hall and Clarke, 1888, Nat. Hist. N. Y., 



Pal., voL vii, p. 58, pi. xia, figs. 4-6. 

 Dalmanites dentatus Weller, 1903, Geol. Survey N. J., Pal., vol. iii, p. 339, pi. 



xliv, figs. 1-3. 



Description. — " Head subcrescentiform, the lateral and anterior mar- 

 gins forming a parabolic curve, the genal angles extended into rather blunt 

 spines. Glabella depressed convex, broadest in front, surrounded by a 

 well-defined dorsal furrow, frontal lobe broader than long, subelliptical to 

 subrhomboidal in outline. First pair of lateral furrows broad and deep, 

 extending obliquely backward from the dorsal furrow and connected 

 across the median portion of the glabella by a shallow depression. First 

 and second lateral lobes partially coalescent externally by the shallowing 

 of the second lateral furrows, the third pair of lateral lobes entirely sepa- 

 rate from the second. Second and third pairs of lateral furrows indis- 

 tinctly continuous across the median portion of the glabella by slight de- 

 pressions. Occipital furrow sharply defined, continuous across the gla- 

 bella and extending out upon the cheeks. Occipital segment of about the 

 same width, but a little higher than the posterior lateral lobes. Cheeks 

 convex in general contour, with a slightly thickened marginal border. 

 Eyes large, subcrescentiform, their summits as high or higher than the 

 glabella, their anterior extremities opposite the first and their posterior 

 extremities opposite the third lateral furrows of the glabella, bounded 

 externally around the base of the faceted surface by a sharp depression. 



