TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 177 



15430. Crepicephalus augusta Walcott. Cotypes. 



Lower Cambrian. Pioche, Nevada. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1S86, p. 208, pi. 28, 

 figs. 2-2b; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 653, 

 pi. 96, figs. 9-9D. 



24581. Crepicephalus centralis Whitfield. Cotypes. 



Upper Cambrian. Castle Creek, Black Hills, South Dakota . 



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

 p. 341, pi. 2, figs. 21-24. 



= Ptychoparia centralis. 



24573. Crepicephalus ( Loganellus ) granulosus Hall and Whitfield. 



Cotypes. 

 Upper Cambrian. Eureka, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. 11, 

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



= Ptychoparia ? granulosa. 



See Crepicephalus (Loganellus) simulator. 



24660. Crepicephalus (Loganellus) haguei Hall arid Whitfield. 



Cotypes. 

 Upper Cambrian. West side of Pogonip Mountain and near 

 French Mine, White Pine District, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par , IV, Pt. II, 



1877, p. 210, pi. 2, figs. 14, 15. 



15428. Crepicephalus liliana Walcott. Cotypes. 



Lower Cambrian. Pioche, Nevada. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 1886, p. 207, pi. 28, 

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

 pi. 96, figs. 7-7C. 



24617. Crepicephalus (Loganellus) maculosus Hall and Whitfield. 



Cotypes. 

 Middle Cambrian. Eureka, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. II, 

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



= Ptychoparia maculosa. 



24572. Crepicephalus (Loganellus) nitidus Hall and Whitfield. 



Cotypes. 

 Upper Cambrian. Eureka, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. II, 

 1877, p. 212, pi. 2, figs. 8-10. 



= Ptychoparia ? nitidus. 



24580. Crepicephalus planus Whitfield. Cotypes. 



Upper Cambrian. Castle Creek, Black Hills, South 

 Dakota. 

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



P- 343. pl- 2 . fi g- 20 - 

 = Ptychoparia planus. 

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