134 . PALEONTOLOGY OF THE EUREKA DISTRICT. 
Surface marked by closely arranged, slightly undulating, concentric 
strie and slight undulating ridges of growth in some examples. A few slen- 
der curved spines are scattered irregularly over the surface. ; 
The interior of the ventral valve is minutely papillose throughout; 
other interior characters unknown. 
It is with hesitation that a new specific name is given to a species of 
this genus, owing to the range of specific variation within it. As indicated 
by the name, the species is related to P. hirsuta Hall of the Chemung Group 
of New York. It differs in the surface characters. It has a few minute 
scattered spines on a comparatively smooth surface, while P. hirsuta has fine 
spines with elongate bases over the entire surface, and also a row of long 
spines near the cardinal border. 
Formation and localities —Upper Devonian, White Pine shale, on the 
south slope of Diamond Peak, Eureka District, and also at the same geologic 
horizon throughout the shale on the east side of Applegate Canon, White 
Pine Mining District, Nevada. 
Genus SPIRIFERA Sowerby. 
Spirifera disjuncta Sowerby, 1840. 
Synonyms: See Davidson’s Monograph of British Devonian Brachiopoda, and Paleon- 
tology of New York, vol. iv, p. 243. To this there may be added: 
Spirifera Norwoodi Meek, 1860. Proc. Acad. Nat. Sci. Philad., vol. xii, p. 308 (not 8. 
Norwoodi Hall). 4 
Utahensis Meek, 1860. Note appended to extra copies of above cited paper. 
Kennicotti Meek, 1868. Trans. Chicago Acad. Nat. Sci., vol. i, p. 101, pl. xiv, 
fig. 9. 
Utahensis Meek, 1876. Rep. Expl. Great Basin of Utah, Simpson, p. 345, and 
Geol. Expl. Fortieth Par., 1877, vol. iv, p. 39, pl. ili, figs. La-e. 
The types of Mr. Meek’s Spirifera Utahensis were collected at The 
Gate, northwest of Eureka, and cited as coming from a dark limestone of 
Devonian age, in longitude 115° 26’ W., latitude 39° 30’ N., a locality 
named Swallow Canon by Captain Simpson, and now known as The Gate. 
From this locality a number of very perfect specimens were obtained by 
the Eureka Survey. They exhibit the narrow, rotund form, and also the 
short form with extended lateral angles. The examples of the species used 
