22 J. W. DAWSOX ON CI^ETACEOrS AND TEETIAIJY 1-'T,0RAS 



I'litirc, but thi.s is not (crtiiin. Tholoafol' this species is iu>t iinliki' tliat of the other Creta- 

 ceous beet'hes, as F. poh/r/iida, Lesq.. and F. nrlacen, Newbeny. and also resembles tlie /•"'. 

 AiiJijHtfi of Ileer, from Saelielin Island nil the coast ol' Sil)cria. This Sachi'lin llora is 

 regarded liy lleer as Tertiary, but it has a very Cretaceous aspect. 

 Collected at Peace liiver by Dr. t^ehvyn. 



0. LVUROPIIYLTJTM PF,I?II,K, S. N. (Fiff. 1. 7a.) 



Leaf elongate, oblong", G to T centimetres long, and '2.'> Inroad in middle, thin and 

 delicate, with a slender midrib, obsolete alternate veins, at angle of 40' to 50', and dense 

 reticxilation of line veinlets (magnified in liii'. Ta) ; margin entire, base narrowing to jieiiole, 

 apex not well seen, but probably acute. 



Collected by Dr. Selwyn at Forks ol Peace liiver. and by Dr. tl. M. Dawson at east 

 branch of Peace R. 



10. PiioTEOiDES i>ONOiTs, Hcer. (Fig. 8.) 

 Heer, Kreide Flora, p. 10, Plate 31, Fig. 5. 



The venation of this leaf cannot be seen ; but it is not <lislingui,shable from the species 

 above named. 



Collected by Dr. Sehvyn at Forks of Peace River, by Dr. G. M. Dawson, at east branch 

 of the same. 



11. Betula, Sp. 



In the collections from Peace River S(n'eral fragment.s with impressions of bark having 

 markings similar to those of the bark of the white birch tree, were found. 



12. P0PULITE.S CYCLOPHYLLA, Heer. (Fig. 9.) 



Lesquereux, Cretaceous Flora, p. 59, plate IV. 



This poplar is so near to that above named, that bearing in mind the variability of the 

 leaves of poplars, I do not think it well to si^parate it. Ti<isqu(Mcux's specimens are from 

 the Dakota formation in Nelnaska. 



Colle<;ted at Peace River by Dr. Selwyn. 



13. DlO.><PYROS NITIDA, S. N. (Fig. ]i».) 



Closely allied to D. aiicej)s, Lesquereux, Imt more narrow and ik utc, with stouter 

 midrib and veins at angle of 40" to 45°, and less < uivc<l. L(>squereux's species seems to be 

 different from that described l)y Ileer in the Flora Helvetica, under the same name. 

 I^c.squereux's .specimens w^ere from the Dakota Ch'oup. Those in the jiresenl collections 

 were obtained by Dr. Selwyn and Dr. G. M. Dawson, in tlie canyon of Peace River.. 



11 M\<i.\<>I,IA TENUIKOMA, J.,es(ir. 



I>»Hr|uereux, Cretiu-eoils Flora, Page 92, PI. XXI. 



Ijfsquereux's specimens were from llie Dakota (irouj). Tliose in the jm'sent collections 

 were collected by Dr. Selwyn and Di, (I M Dawson, al Coal Ibnok and Pea<e River. 



1.'). MaONOMA MAdMKlCA, S. N. (Fig. 1 I I 



F>'iif lurtre, 20 ceiitinictn-K or more in length. (Greatest Ineadth, less than one half the 

 length. Margin entire, midrib strong, in largo spivimons iM-cominu bmad neat ba-e. Veins 



