Maryland Geological Survey 503 



as wide as the intervening furrows, erect, each with a longitudinal groove 

 in the middle which becomes obsolete on the posterior ribs, and bears 

 an occasional pustule. 



This species is founded on a single pygidium in the U. S. National 

 Museum. Its broadly ovate outline, the number and character of the 

 annulations mark it as a distinct species. 



Occurrence. — Oriskany Formation, Eidgely Member. Cumberland. 



Collection.— JJ. S. National Museum. 



[Ohern.] 



Subgenus SYNPHORIA 



Dalmanites (Synphoria) stemmatus Clarke 

 Plate XCIII, Fig. 3 



Dalmanites {Synphoria) stemmatus Clarke, 1900, Mem. N. Y. State Mus., 

 vol. iii, No. 3, p. 15, pi. i, figs. 6-16; pi. ii, figs. 1, 2. 



Description. — " Species attaining considerable size. Cephalon convex, 

 abruptly sloping to the genal margins. Genal extremities somewhat pro- 

 duced but relatively short and terminating in broad obtuse angles. Dorsal 

 furrow deep except at the junction of the glabellar lobes with the palpebral 

 lobe, where it becomes shallow and veiy much elevated. Frontal lobe of 

 glabella large, rounded in front, slightly elongated at the axial extremity, 

 but not projecting beyond the frontal border or facial suture. First lateral 

 furrows long, deep and oblique, extending nearly three-fourths the 

 diameter of the lobe. Glabellar surface behind the frontal lobe slightly if 

 at all depressed medially. Second and third lobes wholly confluent at their 

 extremities, often but a remnant of the second lateral furrows remaining. 

 Together these coalesced lobes have a subtriangular or subclavate outline 

 and are convex and elevated at their distal extremities, rising above the 

 full height of the glabella and almost to the height of the palpebral lobe. 

 The third lobes are small and narrow, making an annular segment, varying 

 but little in -width; their extremities are almost concealed beneath the 

 projecting lobes in front. Occipital furrow deep; occipital segment long 

 and very much arched ; no central spine or tubercle. Cheeks with steep 

 lateral slopes ; somewhat concave within the thickened margin. Furrows 



