12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 95 



Upper Cambrian, Secret Canyon; (loc. 6i) south of the Hamburg 

 Mine, Eureka District, Nevada. 

 Cotypes. — U.S.N.M. no. 24574. 



Elvinia tetonensis, n. sp. 



Elvinia roeineri Miller, Journ. Pal., vol. 10, no. i, p. 30, pi. 8, fig. 36, 1936. 



Compared with E. roeineri, this species has a much shorter brim, 

 which gives the whole cranidium a wider appearance. 



Upper Cambrian, Dry Creek; South Fork Teton Canyon Creek, 

 Teton Range, Wyoming. 



Holotype. — Coknnbia Univ. no. 12631. 



GLAPHYRASPIS, n. gen. 



Diagnosis. — Small trilobite. Glabella rather large, nearly rectangu- 

 lar in outline, well defined by dorsal furrow. Four pairs of short, 

 faint, glabellar furrows. Occipital furrow shallow. Short median, 

 longitudinal furrow in front of glabella. Fixigenes arched, tapering 

 in width from brim to posterior margin. Brim turned downward; 

 rim half or less than half the width of the preglabellar area ; anterior 

 furrow shallow. Eyes small, situated well forward. Delicate eye lines 

 have a horizontal direction. 



Name. — yXa<f)vpo<i = neat ; ao-Tris — shield. 



Genotype. — Liostrociis parvus Walcott. 



Glaphyraspis parva (Walcott) 



Liostracus parvus Walcott, U. S. Geol. Surv. Mon. 32, pt. 2, p. 463, pi. 65, 

 fig. 6, 1899. 



Upper Cambrian, Dry Creek; (loc. 151 f) southeast of Pebble 

 Creek, Yellowstone National Park, Wyoming. 

 Holotype. — U.S.N.M. no. 35233. 



GLYPHASPIS Resser, 1935 



Glyphaspis nevadensis, n. sp. 

 Ptychoparla piochcnsis Walcott (part), U. S. Geol. Surv. Bull. 30, p. 201, 



pi. 26, fig. 2 (only), 1886. 

 Ptychoparia kempi Pack, Journ. Geol., vol. 14, p. 298, pi. 3, fig. i, 1906. 



As stated in 1935, this cranidium clearly belongs to Glyphaspis. If 

 Pack's figure in this instance should be more correctly drawn than his 

 other figures, its reference to this species would be untenable. 



Middle Cambrian, Chisholm ; (loc. 31) southwest slope of the High- 

 land Range, 3 miles northwest of Pioche and Half Moon Mine, Pioche, 

 Nevada. 



Holotype.— U.S.'^M. no. 94346. 



