84 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



Ore Hill formation; (loc. lO/v) ^ mile northwest of Drab, Penn- 

 sylvania. 



Holofypc— v. S.N. M. No. 108827a; paratype, No. 108827b. 



BURNETIA EDWARDSI, new species 

 Plate 20, Figures 20, 21 



A large cranidium associated with species of Taenicephaliis and 

 Orygmaspis occurs on a hand specimen of soft sandstone. Although 

 the brim is narrow, the entire structure is typical of the genus. The 

 glabella, tapering at a normal rate, has several sets of broad, shallow 

 furrows faintly indicated. The occipital furrow also is broad and 

 shallow. The concave brim is subdivided almost equally between a 

 rim and a preglabellar area. Its width is just a little more than a 

 fourth of the cranidial length. The fixigenes are a little less than half 

 the glabellar width. The sharply bowed eyes are of normal size but 

 situated a little farther forward than the ordinary position for the 

 genus. In front of the eyes the sutures diverge considerably to form 

 large anterior angles. Longitudinally the head forms a sigmoid curve 

 with the rear part of the glabella nearly horizontal and the anterior 

 part arched down sharply to the concave brim. Viewed laterally the 

 glabella stands completely above the fixigenes and has a fairly even 

 curvature. 



Franconia sandstone; 2 miles west of Clifton, Monroe County, 

 Wisconsin. 



HoIotypc.~\].S.NM. No. 108832. 



BURNETIA PENNSYLVANICA, new species 



Plate 21, Figures 29-31 



Several cranidia and a libragene from the type locality have been 

 assigned to this species. From the other locality there are other less 

 complete cranidia and fragments of other parts. This species is typical 

 of the genus, belonging to the group in which the brim is not ex- 

 panded. Restoration of the front of the glabella from the counterpart 

 allows the cranidium to be reproduced in its entirety. The glabella 

 tapers forward at the usual rate for cranidia of this type. The rear 

 pair of furrows is deeply impressed, while pits next to the dorsal 

 furrow indicate the position of the other two pairs. The width of the 

 moderately concave brim is just half the glabellar length exclusive of 

 the occipital ring. The rim is much wider than the preglabellar area 

 and is not evenly concave because it has a furrowlike depression 

 paralleling the anterior furrow. The eyes of normal size are so 

 sharply bowed that the palpebral lobe is angulated. At the anterior 



