FOSSILS OF THE DEVONIAN. 105 
The interlamellar spaces are divided by numerous transverse plates; 
the central transverse diaphragms are very small if present at all. 
This is a very distinct and handsome species allied to C. rugosum, or 
what that species would be if growing in the same manner. Still, it does 
not appear that the two are specifically identical. It grows in quite large 
masses, as a fragment shows a depth of 15™. 
Associated with the preceding species at Lone Mountain, 18 miles 
northwest of Eureka, Nevada. 
Cyathophyllum, n. sp. 
Single conical polyparia, annulated by coarse undulations of growth, 
and longitudinally striated by the septal furrows. The bases of root-like 
prolongations from the outer surface often obscure these features. Calyx 
very deep and opening out rapidly. A specimen 35™" in height has a calyx 
22™ in depth, with a diameter of 26™" at the margin. Lamelle from 50 to 
60 in number. This is a strongly marked form, unlike any other known 
to me. 
Associated with the preceding species. 
Acervularia pentagona Goldfuss. See Geol. Expl. Fortieth Par., vol.iv,p.31. 1877. 
In the Paleontologic report of the Geological Exploration of the For- 
tieth Parallel, Mr. F. B. Meek has identified this species from the Devonian 
limestones of the White Pine Mountains, and given an illustration of the 
Nevada specimens. The species, as it occurs in the Middle Devonian, at the 
head of Brown’s Cation, is essentially the same as at White Pine, and there 
appears to be no question of its identity with the European species. 
Pachyphyllum Woodmani (White) H. & W. 1864. Twenty-third Ann. Rep. N. Y. State 
Cab. Nat. Hist., p. 231. 
This is a strongly marked species, and a comparison of specimens from 
the typical locality at Rockford, Iowa, with those from Nevada, shows no 
appreciable differences between the Chemung form and the Upper Devonian 
specimens occurring on the ridge west of Yahoo Camion, in the Eureka 
District. 
Diphyphyllum Simcoense Billings. See Geol. Surv. Michigan, vol. ili, pt. 2, p. 123. 1876. 
This very abundant species of the great Corniferous coral reef of Can- 
ada, New York, Indiana, etc., is represented by a number of specimens from 
Lone Mountain, but not found elsewhere. The stems forming the colonies 
