GEOLOGICAL SUEVEY OF THE TEERITORIES. 289 



• 7. Medicine Bow Coal-Beds. 



Fine-grained, grayish shale, separating- in horizontal layers ; remains 

 of i)lants distinct. 



Phragmites Oeningensis, Heer. A fine stem, with articulations, 

 scars of branches, &c. 



POPULUS LATIOR var. CORDIFOLIA, Al. Br. The same form as that 

 from Alaska, in Heer's Fl. AL, p. 25, PI. ii. Fig. 4. 



PopuLUS ARCTICA, Hecr. Same form as in Fl. Arc, I, PL v. Fig. 11. 



Platanus Guillelm^, Gopp. As in Heer's FL Arc, II, PL xlvii. 

 Fig. 3,' a species represented by onr specimens in manj^ of its varieties. 



Platanfs Haydenii, ]N"ewby., (PL xx, Fig. 1, ined.) The form of this 

 leaf is like that of Flatanus lieterophylla^ Newby., in PL xxi. Fig. 1, ined., 

 with the same nervation also 5 but it has the pbtuse, large teeth of P. 

 Haydenii } the leaf is, however, much smaller 5 may be referable to 

 Flatanus Gttillelmce. 



8. Geeen Eivee Geoup, high on Hills eeom Eivee. 



Coarse-grained, yellow, hard limestone shale, with few remains of 

 plants. 



Ceangthus cinnamomoides, sp. -nov. Leaf narrowly elliptical, 

 pointed to the base, distinctly and distantly crenulate upward from 

 above the base ; medial nerve slightly thicker than the lateral ones 

 which ascend from the base of the leaf, and nearly parallel to the borders 

 to apparently to three-fourths of the leaf, which is obliquely broken above 

 the middle. The medial nerve. has no trace of secondary veins as high 

 as it is discernible, but merely strong, nearly horizontal nervilles, very 

 distinct, like the netting of the areolation ; much like Ceanothus Zizi- 

 plioides^ Ung., chloris especially as figured by Heer, (FL Ter. Helv., 

 PL cxxii, Fig. 25.) It differs by the borders, more distantly crenulate 

 in the upper i^art only, and by the base of the leaf, which is entire and 

 does not i)ass downwaitl beyond the point of divergence of the lateral 

 veins. 



Oaeya Heeeii, Etting. A few fragments of leaves of this species, 

 especially of the form and nervation marked in Fl. Ter. Helv., PL xcix, 

 Fig. 23, a. 



• 

 9. Junction Station, Summit oe Hills, neae Divide, noeth of 



Snake Eivee. 



Hard silicified limestone. 

 - Platanus Guillelm^, Gopp. 



PopuLUS AECTiCA, Heer. Both represented by mere fragments. 



10. Point of Eocks Station, Union Pacific Eaileoad. 



Brown ferruginous clay, with small fragments of plants, mostly unde- 

 terminable. 



Oypeeites. Numerous fragments heaped in various directions, refer- 

 able to Cyperus Deucalionis^ Heer; G. Cliavancnsis, Heerj and C. angus- 

 tior^ Heer. (Jl) None distinct enough for identification. 



Fagus Antipofii, Heer, (Fl. Alas., p. 30, PL vii. Fig. 4 to 8.) An 

 apparently ovate, long-pointed leaf, AYitli straight, nearly parallel, slightly 

 diverging, oblique secondary veins. These are simply craspedodrome. 

 and the point where they reach the borders is marked by very small 



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