GEOLOGICAL SURVEY OF THE TERRITORIES. 17 



flattened almonds, attached at their point and pressed together. It is 

 divided upward in four unequal lobes, the two of the middle being 

 longer and more flattened or narrower ; the other shorter, more inflated, 

 divided to half their length, which varies from :| to J of an inch, and 

 truncate at the lower end. The relation of this species is, like that of 

 the former, unknown to me. 



Carpolithes Mexicanus, sp. nov. Much like some of the nuts 

 described above as G. palmarum, differing, however, by its exactly ovate- 

 cylindrical, pointed form. 



6. Hot Springs, Middle Park. 



A piece of hard siliceous tufa or grit. 



JuGL ANS THERMALis, sp. fiov. Leaf o vatc, lanceolate, cuneate-pointed, 

 rounded in narrowing to the petiole, (broken,) 5 inches long, about 2 

 inches broad ; medial nerve sharp and narrow ; secondary veins irregu- 

 lar in distance and direction; the lowest pair more oblique, separated 

 by horizontal tertiary veins anastomosing with branches of the second- 

 ary. Nervation analogous to that of J. obtusifolia, Heer, Fl. Ter, Helv., 

 PI. cxxix, Fig. 9; form of leaf like J. longifolia, Heer, loc. cit., Fig. 10. It 

 might be identical with this last species, of which the only leaf figured 

 does not represent the tertiary nervation. 



GENERAL REMARKS. 

 GREEN RIVER, ABOVE FISH BEDS. 



The geological station of this place, from indication of the fossil plants 

 described, appears to be of a different stage from that of any of the 

 other localities which have furnished materials for the present examina- 

 tion. In the former report, p. 289, the station of Green River is left 

 indeterminate, one species only, Ceanothus cinnamomoides, being recog- 

 nizable from the few specimens then on hand. ISTow we have besides 

 this one, still found in the newly received lot of specimens, twenty-one 

 species affording data for comparison. Except the omnipresent forms 

 of the Tertiary, Arundo, Phragmites, and Juncus, all these plants bear 

 a more recent facies than the species of Evaustou, Point of Rocks, and 

 Fischer's Peak, especially by their relation to living species — Ceanothus 

 cinnamomoides, comparable to some of the numerous species of Califor- 

 nia; My rica nigricans, allied to our Myrica Gale,L.', Ficus Ungeri, to 

 Ficus Americana; Ampelopsis tertiaria, to the well-known Ampelopsis 

 quinquefolia, Michx.; Ilex affinis, scarcely distinguishable from Ilex cori- 

 acea, Chap., of Florida ; Rhus acuminata, related to our common Rhus 

 aromatica, L.; and Eucalyptus Americamis, to some species of this genus, 

 inhabiting Australia. From these new species Juglans Schimperi is the 

 only one which does not appear related to any of the present flora. Of 

 the species of Green River described already from the Miocene of 

 Europe, Salix augusta, apparently identical with the living Salix vimi- 

 nalis, L., and Salix media, are both from Oeningen, or from the upper 

 stage of the Miocene; Myrica salicina, Quercus lonchitidis, and Ilex steno- 

 phylla, have representatives in both the Upper and the Middle Miocene; 

 Ficus populina, o\i\j, belongs to the Lower Miocene; but as seen from 

 the description, our American form differs in some points from the 

 European, and may prove to be a difterent species. As related to Arctic 

 types, we have only from Green River Juglans denticulata, (?) which, if 

 not identical with the Greenland species, is at least closely allied to it. 

 2 S G s 



