NO. 3 CAMBRIAN TRILOBITES 209 



Formation and locality. — Upper Cambrian : Eau Claire formation ; 

 (84) Dresbach, opposite the mouth of Black River, Winona County, 

 Minnesota. 



Also (78a) topmost bed on Mount Washington, near Eau Claire; 

 (98, 98X) upper beds, middle beds, and lower beds near Eau Claire, 

 Eau Claire County; (ygx) near the flour mill on Beaver Creek, 

 north of Galesville, and (looa) at Ettrick, both in Trempealeau 

 County; (83a) Rock Falls, and (100) near Menomonie, both in 

 Dunn County ; also Dresbach formation ; (83*) lower beds just 

 above the river, Trempealeau, Trempealeau County, all in Wisconsin. 



CREPICEPHALUS LILIANA Walcott 



Plate 29, figs. 5, 5a-f 



Crepicephalus liliana Walcott, 1886, Bull. U. S. Geol. Survey, No. 30, p. 



207, pi. 28, figs. 3, 2><^-c. (Description and illustration of cranidium and 



pygidium.) 

 Crepicephalus liliana Walcott, i8gi, Tenth Ann. Rept. U. S. Geol. Survey, 



p. 653, pi. 96, figs. 7, ya-c. (Republishes illustrations of 1886.) 



A detailed description of the specimen representing this species 

 was published in 1886, and nothing has been added to it since. The 

 illustrations are given in this paper in order that the American species 

 referred to Crepicephalus may be brought together for comparative 

 study. 



Formation and locality. — Lower Cambrian: (31a) Limestones of 

 Pioche formation, just above the quartzite on east side of anticline, 

 near Pioche; (30) limestone 8 miles (12.8 km.) north of Bennetts 

 Spring, on the west slope of the Highland Range, both in Lincoln 

 County, Nevada. 



CREPICEPHALUS TEXANUS (Shumard) 



Plate 29, fig. 7 ; plate 30, figs. 1-4, 4a 



Arionellus (Bathyurus) texanus Shumard, 1861, Am. Jour. Sci. and Arts, 



2d ser.. Vol. 32, p. 218. (Description of species.) 

 Crepicephalus texanus Shumard sp. Walcott, 1899, Monogr. U. S. Geol. 



Survey, p. 460, pi. 65, fig. 5. 

 Not Crepicephalus texanus Walcott, 1908, Smithsonian Misc. Coll., Vol. 53, 



pp. 177, 178. 

 Crepicephalus texanus (Shumard) Grabau and Shimer, 1910, North Am. 



Index Fos., Vol. 2, p. 283, fig. 1586. (Reproduces Walcott's figure of 



1899.) 

 The type specimen of this species is no longer accessible, having 

 been destroyed by fire many years ago. Its locality was given as 

 Clear Creek, Burnet County, Texas. The geological map of the 



