TYFK SPECIMENS OF INVKKTKMHATK FOSSILS. 177 



15430. Crepicephalus augusta W'alcott. Cotypes. 



Lower Cambrian. Pioche, Nevada. 



Walcolt, liiill. No. 3.., U. vS. Geol. Surv., 1.SS6, p. 2u.S, pi. 2S, 

 fij^s. 2-2I); Tenth .\iiii. Kept. U.S. Geol. Surv., I'Sgo, p. 653, 

 pi. 96, fi^.s. 9-9''- 



245S1. Crepicephalus centralis Wliillk-Ul. Cotypes. 



Upper Cani])riaii. Castle Creek, Black Hills, vSouth Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 p. 341, pi. 2, fig.s. 21-24. 



= Ptychoparia centralis. 



24573. Crepicephalus ( Loganellus ) granulosus Hall and Whitfield. 



Cotypes. 

 Upper Cambrian. luu'eka, Nevada. 



Hall and Whitfield, Rept. U. vS. Geol. I';xi)l. .\nth Par., IV, Pt. II, 

 1877, p. 214, pi. 2, figs. 2, 3. 



^Ptychoparia ? .t^rantilosa. 



vSee Crepicephalus ( I/)_y^anelhis ) sinudator. 



24660. Crepicephalus ( Loganellus 1 haguei Hall and Whitfield. 



Cotypes. 

 Upper Cand)rian. West side of Poi^onip Motnitain and near 

 French Mine, White Pine District, Nevada. 



Hall and Whitfield, Rept. V. vS. Geol. Hxpl. 40th Pa:- , I\', Pt. II, 

 1S77. ]). 210, ])1. 2, figs. 14, 15. 



15428. Crepicephalus liliana Walcott. Cotypes. 



Lower Cambrian. Pioche. Nevada. 



Walcott, Bull. No. 30, U. vS. (ieol. Surv., 1886, p. 207, pi. 28, 

 figs. 3-3C; Tenth Ann. Rept. U. S. Geol. vSurv., 1890, p. 653, 

 pi. 96, figs. 7-7C. 



24617. Crepicephalus (Loganellus) maculosus Hall and Whitfield. 



Cot\])es. 

 Middle Canii)rian. Eureka, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. E.xpl. 40th Par., I\', Pt. II, 

 1877, p. 215, pi. 2, figs. 24, 26. 



= Ptycho])aria mactilo.sa. 



24-72. Crepicephalus (Loganellus) nitidus Hall and Whitfield. 



Coty])es. 

 Upper Cambrian, liureka, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Kxpl. .juth Par., IV, Pt. II,' 

 1877, p. 212, 1)1. 2, figs. 8-10. 



= Ptychoi)aria ? nitidus. 



24580. Crepicephalus planus Whitfield. Cotypes. 



Upper Cami)rian. Castle Creek, Hlack Hills, South 

 Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills I)akt)ta, 1880, 

 p. 343, pi. 2, fig. 20. 



~ Pt\choparia jilanns. 



23232—05 12 



