198 PALEONTOLOGY OF THE EUREKA DISTRICT. 
Professor Hall, in speaking of Styliola fissurella, says: 
“In its geographical distribution, the S. fissurella has a remarkable 
range, being known throughout the entire extent of the State of New York 
from east to west, a distance of more than 300 miles. It also occurs in the 
State of Indiana, which gives it a geographical extension of more than 700 
miles in a direct line from its most easterly locality. 
“In some of its phases it does not seem possible to separate this spe- 
cies from Styliola clavulus of Barrande by any external or internal characters 
thus far described or illustrated. The fossils are minute, smooth, or striated 
acicular tubes, presenting in all respects similar features and having similar 
associations, and they are of the same geological age in the two countries. 
In very numerous examples these fossils are striated transversely or longi- 
tudinally, and not unfrequently the two sets of strize are visible on the same 
specimen. These are apparently only varieties of form and condition of 
the Styliola fissurella.” 
These latter remarks apply in full force to the specimens of this inter- 
esting species as it occurs in Central Nevada. Here it has the same asso- 
ciations and is of the same geologic age. It has not been discovered, as 
far as known, in the interval of 1,600 miles between its former known west- 
ern extension in the State of Indiana and the present limit. This is, how- 
ever, largely due to the few localities where the Devonian rocks are ex- 
posed to examination, and the fact that the great mass of Paleozoic strata 
west of the Mississippi Valley have been but partially examined by the geolo- 
gist, and paleontologic investigation has been the result of hasty collecting 
rather than a systematic study of the fauna of any locality or horizon. 
Formation and locality— Upper Devonian limestone, Eureka District, 
Nevada. 
Genus CONULARIA Miller. 
Conularia (sp. undt.). 
A single fragment was found in the lower beds at Comb’s Peak, but 
not in a condition to determine its specific relations. 
