DESCKIPTION OF SPECIES— RHAMNE.T^. 277 



Z g z y |i Ib II s c i ii ii a ni o in o i d o s , Lesqx. 



riate LII, Figs. 7,^. 

 Ccanolhns cinnamomoides, Lesqx., Annual Report, 1871, p. 289. 



Leaves membranaceous, oblong, narrowly cuneate to the b ase, obtusely distantly dentate below 

 the middle upward; nervation triBd. 



The relation of these two fragments of leaves, whose upper part is de- 

 stroyed, is with Ceanothvs sicyphoides, Urig., as described and figured by Heer 

 (Fl. Tert. Helv., iii, p. 74, pi. cxxii, fig. 25) under the name of Zici/jihus Ungeri. 

 But they differ evidently by the primary lateral veins, which, shorter, ascend to 

 above the middle, where they anastomose with branches of the midrib. In 

 Unger's species, the midrib is simple and the lateral nerves aerodrome. Tlie 

 details of nervation are quite distinct and as figured, being formed by subdivi- 

 sions of the nervilles, nearly in right angle, of small equilateral or quadrate 

 meshes. The borders are obtusely toothed rather than crenatc; the teeth 

 do not appear to be entered by the branches, but only by nervilles. 



Habitat. — Green River Station, Wyoming, above the fish-beds, with 

 Ampelopsis lertiaria, etc. {^Dr. F. V. Haydcn). 



BERCHEMIA, Neck. 

 Bci'clicinia iuiiltin«rvis, Al. Br. 



Plate LII, Figs. 9, 10. 



Cerchemia mHllinewis, Heer, Fl. Tert. Helv., p. 77, pi. cxiii, figs. 9-18. — Sism.,Prod., p. 15; Mat«r , p. M, 

 pi. sxix, fig. 8. — Sap., Et., iii, p. 107, pi. xii, figs. 2,3. — Ett., Foss. Fl. v. Bil., iii, p. 41, pi. 

 xlix, fig.s. 15-17. 



BliamHus mitUhtemis, Al. Br., in Biickl. Geol., p. 513. 



liurtcinskia miiHUieri-is, Al. Br., in Leonb. and Bronn, Jabrb., lt;45, p. 172. — Ung., Cblor. Prolog., p. 147, 

 pi. 1, fig. 4. 



Kartvinslcia (Eningensis, A\. Br., in Bruckm. Verz., p. 2.32. 



JBercliemia parmfoUa, Lesqx., Annual Eeport, 1809, p. 196; Supplement to Annual Report, 1871, p. 15. 



Leaves ovate-obtuse, rounded to tbe petiole ; borders very entire ; lateral nerves numerous, close, 

 parallel, slightly curved, subopposite, simple, eamptodrome; nervilles close, numerous, distinct, simple 

 or branching. 



I remarked in the last memoir quoted aI:)ove that the name given to the 

 first leaf (fig. 9), communicated by Dr. J. Leconte from Eaton Pass, was 

 not appropriate, as a new specimen had been sent from the Raton Lignitic, 

 with a leaf as large as those of our common B. voluhilis^ to which the fossil 

 species is closely related. I then remarked also that the American form 

 merely differed from that of the European Miocene, as represented by Heer 

 '{Joe. cit.), hy the secondary nerves being open from the midrili, while they 

 are slightly turned downward at their point of contact in the figures given 

 by this author. But other leaves, represented by Saporta, d'Ettingshausen, 



