106 PALEONTOLOGY OF THE EUREKA DISTRICT. 
or corallum are larger than the average in the species, but the specific iden- 
tity of the eastern and western species is a very close one. 
Cystiphyllum Americanum Milne-Edwards. See Geol. Surv. Michigan, vol. iii, pt. 2, p. 
138. 1876. 
As there is considerable variation in the size and form of the polyparia 
and the vesicles, as well as the distinctness of the plications, in the forms 
referred to this species, it is quite probable that the one under consideration 
will fall within its limits. It presents all the characters common to many 
New York and Ohio specimens, and we have little hesitancy in referring it 
to this species. 
Formation and localities —Lower horizon of the Devonian limestone; on 
the divide at the head of the Reese and Berry Cain, and at Lone Mountain, 
18 miles northwest of Eureka, Nevada. 
Cystiphyllum, n. sp. 
There are two species of Cystiphyllum in the collection that do not 
appear to be specifically allied to any described forms. One has the outer 
surface studded with little nodes and the calyx of considerable depth, with 
numerous sharp lamellz that in some instances are nearly concealed by 
coarse vesicles. ‘The corallum is about 40™™ in length, 20 to 25™™ in diam- 
eter at the summit, and more or less strongly marked by broad ridges of 
growth. The other species has the latter character in a modified degree, 
but lacks the nodulose surface; the interior of the calyx is filled with 
vesicles from the center of which a young corallum springs. 
At Lone Mountain with the preceding and other species. 
Besides the above-mentioned forms, there are two species of Zaphrentis 
too imperfect for description, and a large Cyathophylloid coral of unknown 
specific relations. 
BRACHIOPODA. 
Genus LINGULA Bruguiére. 
Lingula Lena Hall. 
Plate xiii, fig. 2. 
Lingula leana Hall, 1867. Pal. N. Y., vol. iv, p. 9, pl. ii, fig. 12. 
The Nevada shell is not quite as elongate or rounded in front as much 
as the New York examples of this species, but it agrees with them in all 
