FOSSILS OF THE DEVONIAN. 



The interlarnellar 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. ruyosum, 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 cm . 



Associated with the preceding species at Lone Mountain, 18 miles 

 northwest of Eureka, Nevada. 



Cyathophyllum, 11. 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 mm in height has a calyx 

 22 mm in depth, with a diameter of 26 mm at the margin. Lamella? from f,0 to 

 60 in number. This is a strongly marked form, unlike any other known 

 to me. 



Associated with the preceding species. 

 Acervuiaria 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 Canon, is essentially the same as at White Pine, and there 

 appears to be no question of its identity with the European species. 



Pachyphyiium Woodman! (White) II. & W. 1864. Twenty-third Ann. Eep. 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 Canon, in the Eureka 

 District, 

 Diphyphyiium Simcoense Billings. See Geol. Surv. Michigan, vol. iii, 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 



