NO. 10 CAMBRIAN FOSSILS, 4TII CONTRIBUTION RESSER 29 



also has a wider preglabellar area. Glabellar furrows are evidently 

 very faint. 



Upper Cambrian, Kaolishanian ; Pagoda Hill, Taianfu, Shan- 

 tung, China. 



Cotypes. — Geol. Surv. China nos. 579-583. 



DEADWOODIA, n. gen. 



This trilobite genus is represented by a single cranidium. How- 

 ever, it appears among undescribed material of Ironton age, from 

 several localities and consequently description is warranted. 



The cranidium is characterized by a very large, nearly quadrate 

 glabella, highly arched in both directions and standing high above the 

 fixigenes. Glabellar furrows essentially absent. Occipital furrow 

 deep, but narrow. Brim is wide, concave as a whole. Preglabellar 

 area slightly convex, dipping steeply down from the dorsal furrow. 

 Anterior furrow shallow, with the essentially flat rim turned nearly 

 into a horizontal position. Fixigenes narrow, as well as the postero- 

 lateral limbs. Eyes rather large, strongly bowed, and palpebral lobes 

 separated by deep furrows. 



Genotype. — Ptychoparia (Liostracus) panope Walcott. 



Deadwoodia panope (Walcott) 



Ptychoparia (Liostracus) panope Walcott, Proc. U. S. Nat. Mus., vol. 13, 

 p. 275, pi. 21, fig. 13, 1890. 



Upper Cambrian, Dead wood (Ironton equivalent) ; Spring Creek 

 Canyon, about 7 miles southwest of Rapid City, Black Hills, South 

 Dakota. 



Holotype.—V.S.NM. no. 23856. 



EHMANIA Resser, 1935 



Ehmania ? agatho (Walcott) 



Asaphiscns ? agatho Walcott, Smithsonian Misc. Coll., vol. 64, no. 5, p. 391, 

 pi. 63, figs. 9, 9a, 1916. 



Upper Cambrian, Nolichucky ; (loc. 123a) Big Creek, 4 miles 

 northeast of Rogersville. Tennessee. 

 Cotypes. — U.S.N.M. nos. C2819-20. 



ELVINIA Walcott, 1924 



Elvinia roemeri (Shumard) 



Dikctocephalns rocmcri Shumard, Amer. Journ. Sci., 2d ser., vol. 32, p. 220, 

 1861. 



