96 SUEVEY OF COLOEADO AND NEW MEXICO. 



3. Populus sxibrottinda, sp. nov. Type of neuration of P. melanaria, Heer, and form of 

 leaves of P. mutabilis, Heer, both species also common in the mioceue of Europe. 



4. Qiierciis acrodon, sp. nov., a fine oval leaf resembling a chestnut leaf, related to 

 Quercus prinoides, Wild, of oiu- time. 



5. Quercus haydeni, s]d. nov., lyrate leaf with lobes strongly dentate, without near 

 relation to any species either of tlie tertiary or of our time. 



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

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



Marshall's mine (ne.ui denvee.) 



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

 described in my paper, "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 quercus, but all belong to the sj)ecies described and figured by Heer under this 

 name, and common in the whole thickness of the European miocene. 



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

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

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

 lower miocene. 



3. Cinmnomum offine, sp. nov. This species is also found at Eaton Pass. The leaf from 

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

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

 to C. bucM, Heer, of the lower mioceue of Europe. 



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

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

 this leaf appears inclose relation to, if not identical with, Conius r]iam)iifoJius,Woh. 

 Pretty common in the lower miocene of Europe. 



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

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

 straight wing lilce that of Jeer trllohatum, Heer, but with smaller nutlet. 



6. Jihamnus salieifolia, sp. nov., in soft sand.stone; related to R. maryinalus, Lesq., and 

 andals'o to It. caroUniauus, Walt., now living and abundant in southern swamps. 



7. Juglans ruyosus, sp. nov., very nearly rehited to J. acuminata, Al. Braun, a siiecies 

 extensively distributed in the European miocene. 



8. Echifonium sophia\ 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. PhyUitcs sukatus, sp. nov. The borders of the leaf are destroyed, but the nervation 

 is quite peculiar. It is referable either to a Ehodora like R. canadensis of our time, or 

 represents merely the lower part of the winged petiole of the fruit of a linden, (Tilia.) 



10. Lygodium compaetum, sp. nov. Though many species of lygodiums are described 

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

 and' 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 ienuinervis, 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 otlier fossil siiecies. 



2. Laihra'a arguta, sp. nov. May be a Pecopieris. No relation observed of any known 

 species to this one. 



RATON PASS. SPECIMENS COLLECTED BY DR. LECONTE. 



1. Berchemia parvifolia, sp. nov. Eelated to B. multinervis of the Euroiiean miocene, 

 but still more like our Berchemia voluhills which fills the southern swamps. The basilar 

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



2. Abietitcs dubius, sp. nov. 



Most of the specimens fr-om Eaton Pass have some remains of leaves or branches of a 

 coniferous species which can be referred, perhaps, 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 place these remains in this genus till they may be studied on bet- 

 ter specimens. The leaves are pointed as in Taxites dubius, Gopp., from the tertiary of 

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



3. EcMtonium sopMce, Web. A small fragment exactly like those of Marshall's coal 

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



