122 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol. 50 



son I have decided to recognize Newberry's species. A larger series 

 would be quite likely to show that this supposed distinction is not 

 valid. 



Dr. Newberry was not able to note the nervation in the leaflets, 

 as the nerves were "sunk in the parenchyma," but in one of the 

 specimens before me which is exceptionally well preserved, it ap- 

 pears that there are always four strong nerves, between which are 

 a large number of very fine faint nerves. 



In some cases the specimens are so well preserved that the actual 

 epidermal substance of the leaflet is retained as a thin, delicate, car- 

 bonaceous film, which can often be pulled off almost entire. 



At my request Dr. Albert Mann, of the U. S. Department of Agri- 

 culture, who is especially skilled in all branches of microscopic tech- 

 nique, has kindly undertaken to prepare microscopical slides of these 

 carbonaceous films, and the result has been entirely satisfactory, the 

 epidermal structure being plainly revealed. In the irregularity of 

 the cell outline, character and disposition of stomata, etc., they agree 

 very closely with similar structures described in various fossil 

 cycads, 1 but Dr. Mann has called my attention to the fact that the 

 structure differs entirely from that of certain living species to which 

 the plants are supposed to be related. The subject is therefore de- 

 ferred to a subsequent paper, in which it is hoped to present the 

 evidence in full. 



Locality.— Spanish Coulee, 12 miles east of Cascade, Cascade 

 County, Montana? 



In addition to the above, there are two or three fragmentary speci- 

 mens doubtfully referred to this species from cut on Hazlett Creek 

 3 miles south of the Bauer slrcep ranch. 



PTEROPHYLLUM MONTANENSE (Fontaine) n. comb. 



Plate XIV, Fig. 3 

 Zamites montanensis Fontaine, Proc. U. S. Nat. Mus., vol. 15, 1892, p. 



494, pi. LXXXIV, fig. 4. 



Professor Fontaine based his species on a drawing of a single 

 imprint, and as this was preserved with the lower side of the leaf 

 uppermost, the insertion of the leaflets was concealed by the thick 

 midrib. It was therefore impossible to decide whether the species 

 should be referred to Zamites or Ptcrophyllum; but as it appeared 



1 c f. Schenk, Palseontographica, vol. 19, 1871, p. 233 [31], pi. xxxv [xv]. 



