196 GEOLOGICAL SURVEY OF THE TEEEITOEIES. 



3. Pojpulus siihrotunda, sp. nov. Type of neuration of P. vielanaria, Heer, and form of 

 leaves of P. mutahilis, Heer, both species also common in the miocene of Europe. 



4. Qucrcus acrodon, sp. nov., a line oval leaf resembling a chestnut leaf, related to 

 Querciis prinoides, Wild, of our time. 



5. Qucraus haydcni, sp. nov., lyrate leaf with lobes strongly dentate, "without near 

 relation to any si)ecies either of the tertiary or of our time. \ 



6. Flatamis, aceroides, Gopp., one of the most common species of the miocene of Europe. 

 It i«; closely related to, if not identical with, P. occidentalis, L., of our time. 



MARSHALL'S JIIXB (NEAR BENVEE.) 



1. Quercus cMoropliylla, Ung. Three specimens of this species have been figured and 

 described in my j)aper, "On species of fossil plants from the tertiary of Mississippi," 

 (Trans. Phil. Soc, vol. 13, pi. xvii, figs. 5, (5, 7.) It is still uncertain if these leaves rep- 

 resent a qucrcus, but all belong to the species described and figured by Heer under this 

 ]iame, and common in the whole thickness of the Eiu'ojiean miocene. 



2. Qucrcus hjelli, Heer, also figured in the above paper, pi. xvii, figs. 1, 2, 3. Though 

 the siDecimen is somewhat obscure, the essential characters which distinguish the species 

 are Avell discernible. It is abundant in the Bovey Tracy lignite formations of England, 

 lower miocene. 



3. Cinamomnm affine, sp. nov. This species is also foxnid at Raton Pass. The leaf from 

 Eaton Pass is smaller and might belong to a^lifferent species, but except the size I do not 

 find ground for separation ; very near C. mississipjpiensis, Lesq., and also closely related 

 to C. buchi, Heer, of the lower miocene of Europe. 



4. Cornus incompletus, sp. nov. A part of a leaf ajiparently round at the top, general 

 outline uncertain. It is figured merely for future reference. By its peculiar nervation 

 this leaf appears in close relation to, if not identical with, Cornus r]iamnifoJius,"Weh. 

 Pretty common in the lower miocene of Euroj)e. 



5. There are in the Marshall's shales a few fragments of maple leaves (acer) speciii- 

 cally undeterminable, and also one wiuged seed of this genus. This seed has a narrow 

 straight wing like that of Acer trilobatum, Heer, bnt with smaller nutlet. 



6. lihavimis salicifolia, sp. nov., in soft sandstone; related to li. inarginaius, Lesq., and 

 and also to E. carolimanus, Walt., now living and abundant in southern swamps. 



7. Juglans rurjosus, sp. nov., very nearly related to J. acuminata, Al. Braun, a species 

 extensively distributed in the European miocene. 



8. Ecliitonium sopMcv, Web. The leaf has no visible nervation, but it is exactly like 

 both the forms represented from European specimens. It is found in the whole miocene 

 of Europe, especially in the lower stage. 



9. PJiyllUcs sulcatus, sp. nov. The liorders of the leaf are destroyed, but the nervation 

 is qnite peculiar. It is referable either to a Tthodora like E. canadensis of our time, or 

 represents merely the lower part of the Avinged petiole of the fruit of a liuden, {Tilia.) 



10. Lyfjodimn comjiactum, sp. nov. Though many species of lygodiunis are described 

 from the tertiary of Europe, none are related, to ours. One lobe of a leaf only is presented, 

 arid the general outline of the leaf is therefore unknown, but the nervation, which is 

 very close and more like that of a Neuropteris, is of a peculiar character. 



LIGNITE BEDS NEAR GOLDEN CITY, COLORADO. * 



1. Magnolia tenuhiervis, sp. nov. Not possible to indicate the general form of the leaf 

 of which a part only is presented. Its thin and sharp secondary nerves distinguish it 

 from any other fossil species. 



2. Lathrcea arguta, sp. nov. May be a Pecopteris. No relation observed of any known 

 species to this one. 



RATON PASS. SPECIMENS COLLECTED BY DR. LECONTE. 



1. Bercliemia xyarvifolia, sp. nov. Eelated to B. miiltine)'vis of the European miocene, 

 but still more like our Bercliemia voluUlis Avhich fills the southern swamps. The basilar 

 part of the leaf is not seen and therefore a satisfactory determination is not possible. 



2. Abietitcs duiius, sp. nov. 



Most of the specimens from Eaton Pass have some remains of leaves or branches of a 

 coniferous siDccies which can be referred, perhai^s, as well to the genus Araucaria as to 

 Sequoia or Abies. As the leaves on the branchlets appear evidently placed around the 

 stems, and not on both sides of it, and as the scars left on the bark are of the same form 

 as those of an Abies, I jdace these remains in this genus till they may be studied on bet- 

 ter sj)eciraens. The leaves are pointed as in Taxites dubiui, Gopp., from the tertiary of 

 Europe ; except this, these remains have no analogy with any other, published or figured. 



3. Echitonium sopliim, Web. A small fragment exactly like those of Marshall's coal 

 bed and a specimen of Cinnamomum affine. already mentioned, from the Marshall's shales. 



