DESCRIPTION OF SPECIES— RHAMNE^E. 270 



others (Iciitalc. These have the same cliaracler of iicrvalion as marked in 

 fig. 1 1 a. enhirgeil. 



IIaditat. — Golden, Soiitli Tal)le i^roiiiitain, Colorado; one specimon only. 



K Ii a III II u s r c o t i 11 o r V i s , Heer. 



Plate LIl, Figs. Vi-K,. 



Hhammis rectinervis, lleer, V\. Tert. Helv., iii, p. 80, pi. cxxv, figs. 2, C. — Lesfix., Animal Keport, 1871, 

 pp. 29r>,298; Supplemeut, p. 12; Annual Report, 1872, pp. 382, 3'J7, 402; 1873, p. 40.'.. 



Loaves snbcoriaceons, oblong, entire, dentate only toward the point; secondary nerves, eight, to 

 twelve pairs on an acute angle of divergence, caraptodrome. 



The specimens which I refer to this species are numerous in the Lower 

 Lignitic of Colorado and Wyoming. The leaves are rather large, indistinctly 

 dentate toward the point; the secondary nerves, more open in joining the 

 initlril), ascend straight to the borders under an angle of divergence of 30° 

 to 40°, sometimes inequidistant, and generally parallel. Comparing the frag- 

 mcMit of fig. 12 to fig. 6 of Ilecr (/oc. aV.), the identity of the characters is 

 evident. Our fig. 13 is more obtuse, the veins less distant, and at a more open 

 angle of divergence. It seems at first referable to another species; but it is 

 upon the same specimen as fig. 12, has the same facies, and, indeed, there 

 are other fragments which indicate intermediate characters; none, however, 

 with the point preserved but this one. Fig. 15 is more doubtfully referable 

 to this species on account of the very close nervilles. 



Habitat. — Black Buttes, Wyoming, and Golden, Colorado, mostly. The 

 specimen represented in fig. 15 is from the Canon Coal-Measures, by Dr. A. 

 C. Peale. Found also at Evanston, Wyoming; six miles above Spring Canon, 

 Montana; and the Eaton Mountains, New Mexico, by Dr. F. V. Haydev, mostly 

 in fragmentary specimens. 



Rhainniis inseqnalis, Lesqz. 

 Plate LII, Fig. 16. 

 Rhamnnt i«aqualv>, Lesqx., Annual Report, 1873, p. 405. 



Leaf small, subcoriaceous, very entire, inequilateral; secondary nerves alternate, on an aciit« 

 angle of divergence, straight to the borders, caniptoclrome. 



This fragment is rather of uncertain relation; the direction of the second- 

 ary nerves, the inequilateral shape, and the oblique, close nervilles referring 

 it to this genus by a distant likeness to R. CEningensis, Heer, of the 

 European Miocene; the branching of one of these nerves, however, is in 

 contradiction to the general character of nervation of species of Rhamnus. 



