NOTES ON ERIAN (DEVONIAN) PLANTS FROM NEW YORK AND 



PENNSYLVANIA. 



liY 



D. P Penhallow, F. R. S. C, 



McGill ColLge, MoiitrcaL 

 (With ri:it('S ix-xiv.) 



Among a large iinmbcr of Eiiaii plants snbmitted to Sir William 

 Dawson and myself by Mr. C. S. Trosser, of the U. S. Geological Sur- 

 vey, were several wliicJi seemed to admit of ready identification. The 

 larger part weie, however, ol" a doubtfal character, in small fragments, 

 or appeared to be hitherto undescribed, and thus demanded special ex- 

 amination. The results obtained by me are embodied iu the following 

 notes: 



The history of the specimens, as derived from Mr. Prosser, is as fol- 

 lows : 



ISTos. 3, G, and 7 are from Sknnnemuidv Mountain, Orange County, K 

 y. The rocks from whicli they were obtained are designated simply as 

 Devonian. 



No. 45 is from the same locality, but derived from the collection of 

 Prof. D. S. Martin, of New York City. 



Nos. 8, 9, 19, and 30 are from the Upper Chemung of Lanesboro, 

 Susquehanna Ccmnty, Pa., and are deposited in gray mica slate. 



Nos. 15, 28, and 32 are i'rom the Jlamilton (Ironi) of West Hurley, 

 Ulster County, N. Y. 



Nos. 21, 24, 27, 37, 38, 39, and 41 are from the Genesee shale of Lake 

 Cauandaigua, N. Y. 



Nos. 25 and 42 are from the (jenesee Shale of Penn Yan, N. Y., while 

 No. 20 is from the Marcellus Shales at Union Si)rings, Cayuga Lake, 

 New York. 



Gwing to the very imperfect nature of much of this material I have 

 deemed it expedient to separate all such from the more determinable, 

 and have thus brought the whole under the two general heads of (1) 

 dubious si)ecies and (2) determinable species. 



DUBIOUS SPECIES. 



A number of the specimen^ consist of small fragments and show 

 either so little structure or so complete an absence of it as to render it 

 ine.\])edient t(> assign any definite positions to them at the present 

 time, more ])arti(:ularly as tliey can not be made to harmonize with any 



I'l■oc(^e(liIl}^H Natioiiul Muscuiii, Vol. XVI — No. 92H. 



10.5 



