194 GEOLOGY OF THE EUREKA UISTKICT. 



From Applegarth Canyon the White Pine shales yielded the following 

 species : 



Cyathophyllum sp. ? Athyris (of type of A. piano- sulcata). 



Fenestella (2 spJ) Rhynchouella (L) quatMcostata. 



Thamniscus! spJ Aviculopecteii catactus. 



Lingiila alba-piuensis. Nuculites triaugulus. 



Disciua lodensls. Cardiomorpha missouriensis. 

 Chonetes (of type of C. illinoisensis). Luuulicardium fi'agosuin. 



Productus liirsutiforme. HyoUtbes sp. "? 



Productus subaculeatus. Pleuiotomaria sp. 1 

 Productus (of type of P. semireticu- Goniatites kingii. 



latus). Goniatites sp.? 



Spiriferiua cristata. Proetus sp. ? 



AmbocceUa umbonata. Cytoceras cessator. 

 Retzia radialis. 



With the exception of some indeterminable fragments of crinoid col- 

 umns and a few impressions of stems and twigs, the sandstones have yielded 

 no life. The few A^egetable remains, however, are important, as they are 

 of rare occurrence in Paleozoic sandstones of Nevada. The C'arboniferous 

 limestones overlying this belt of sandstones have been but little studied 

 since the exploi'atious of the fortieth parallel, and no additional material 

 throwing light upon the life of the period has been obtained. 



Silurian and Highland Range.— lutlic Highland Range the Silurian rocks have 

 not been as carefully studied as the Cambrian. Indeed, it is by no means 

 certain that in the area covered or in the exjiosure of beds that the Silurian 

 is as well represented as in a number of other ranges, although, as has been 

 already shown, the Cambrian compares favorably with the same epoch in 

 the Eui-eka Mountains. Both the Pogonip and Eureka quartzite, however, 

 are well exposed on the west side of the range in a hill just north of the 

 road leading from Bennett Spring to Hyko, where the fauna in the lime- 

 stone immediately below the quartzite is so characteristic that both forma- 



