178 Trans. Acad. Sci. of St. Louis. 



205. CoRYLUs McQuARRYi, Heer, Ann. Rept. U. S. Geol. 



Surv. 1871: 308. 



206. Fagus Antipofii, Heer, Ann. Rept. U. S. Geol. Surv. 



1871 : 308. 



207. Iris, species, Scudder, Bull. U. S. Geol. Surv. 6, no. 



2: 297. 



208. Onagraceae? sp. nov. Infra, p. 186. PI. XV. fig. 1. 



209. Palaeocarya, species, Scudder, Bull. U. S. Geol. 



Surv. 6, no. 2: 297. 



210. Prunus, species, Scudder, Bull. U. S. Geol. Surv. 



6, no. 2: 296. 



211. RoBiNiA, species, Scudder, Bull. U. S. Geol. Surv. 



6, no. 2: 296. 



212. Sabal, species, Scudder, Bull. U. S. Geol. Surv. 



6: 297. 



213. Spiraea, species, Scudder, Bull. U. S. Geol. Surv. 



6, no. 2:296. 



DESCRIPTIONS OF NEW SPECIES. 



MUSCI. 

 Hypnum. 



1. Hypnum Brownii, sp. nov. (Plate XII. figs. 4, 4a). 



Stems creeping, forked or divided into nearly opposite 

 branches; leaves ovate lanceolate, acuminate, concave. 



This specimen is figured here to show the general habit of 

 the plant. The leaves in most cases are indistinct and only 

 the more solid stems are discernible. The plant seems to be 

 analogous to the recent species H. populeum, Sw. The 

 stems are slightly curved and the leaves on some portions are 

 faintly visible. The leaves do not appear to be very closely 

 imbricated. The tissues of mosses are very delicate, which 

 explains why the fossil remains are so exceedingly rare. It 

 is only in the later formation that the fossil forms are found. 



