16 GEOLOGICAL SURVEY OF THE TEERITORIES. 



parallel in the middle, rounded downward, with an abrnpt short de- 

 scending curve to the base of the medial nerve. Secondary veins par- 

 allel, 8 pairs, open, (angle of divergence, 60°,) abruptly curving near 

 the borders, camptodrome. The point of the leaf is destroyed. Be- 

 lated to X. dentatum, Heer, Fl. Ter. Helv., PI. cxxvii. Fig. 21. 



JuGLANS Smithsoniana, s}). iiov. Leaves smooth, lanceolate, taper- 

 ing into a long point, deeply undulate, abruptly curving downward, to 

 the petiole, medial nerve iiat and broad; lowest pair of secondary veins 

 very oblique, running to and curving along the borders opposite; the 

 other pairs alternate, distant, ii-regular in direction, curving also in 

 ascending to and along the borders; tertiary nervation obsolete. A 

 fine species represented by only one specimen, resembling by its nerva- ' 

 tion J. Baltica, Heer, Fl. Bait., PI. xxix. Fig. 10, and by its general form 

 J. 8cMmi)eri, Lsqx., described above, a true Jtiglans, though the leaf 

 appears somewhat thick or coriaceous. 



5. Placer Mountain, New Mexico. 



A coarse, blackish, hard, metamorphic sandstone, with obscure re- 

 mains of leaves; few of the specimens of this locality are distinct 

 enough to allow positive identification of the leaves. 



POPULUS balsamoides, Gopp. One leaf only, broadly ovate-cordate, 

 abruptly narrowed to a point; medial nerve narrow; secondary veins 

 numerous, 11 to 12 pairs, open, parallel, curving to and along the bor- 

 ders, (camptodrome.) The borders are apparently entire; but the 

 coarseness of the stone prevents ascertaining it positively. It may rep- 

 resent a new species, differing from P. balsamoides by more numerous 

 and parallel secondary veins. These veins appear to curve upward 

 quite near the borders, and to join the superior divisions as in our P. hal- 

 samifera, L., var. candicans. 



QuERCUS PLATANIA, (!) Heer. A mere fragment which agrees only 

 by its nervation. Another broken specimen of the same character has 

 the veins less distant, and agrees \)j its general outline and nervation 

 with Q. Olafseni, Heer. Both appear to represent the same species of 

 a Quercus as yet undeterminable. 



Fious aTLi^EOLiA, Heer. Only j)art of a leaf whose nervation is 

 distinctly preserved and undoubtedly referable to this species. Another 

 leaf of Ficus has the lateral basilar veins alternate as in F.Morloti, Heer, 

 Fl. Ter. Helv., PI. Ixxxii, Fig. 8. 



Platanus Guillklm^, Heer. Eepresented by a number of speci- 

 mens, all fragments, scarcely recognizable. 



CiNNAMOMUM MississiPPiENSE, [^sqx. It differs by the secondary 

 veins, not quite as thick, ascending, in the upper part of the leaves 

 along the borders, as in some leaves of C.Buchi, Heer, Fl. Ter. Helv., PI. 

 xcv, Fig. 3. This difference is not characteristic. As remarked in my 

 description of this species, loc. cit., p. 418, the reversed figure of (7. Bu- 

 chi, represents exactly by its form that of C. Mississippiense. 



Magnolia ! Species undeterminable, mere fragments. 



Carpolithes spiralis, sp. nov. A hard fruit of a remarkable form. 

 It is oval-cylindrical, obtuse at one end, truncate at the other, 2 inches 

 long, half as broad, obtusely narrowly ribbed, the ribs ascending in spi- 

 ral around it from its truncate base, above which it is slightly con- 

 tracted by two deep parallel lines, cutting the ribs at a right angle 

 without changing their direction. I do not know any fruit to which 

 this might be compared. 



Carpolithes compositus, sp. nov. It looks like a compound of 



