374 



berry from the so-called Miocene formations of Alaska, Greenland, and 

 especially of the Fort Union group, with which the group of Porcupine 

 Creek appears very closely allied. From the group of the Great Valley, 

 he has three species: Equisetum Parlatorii, Heer, of the Miocene of 

 Europe, to which our Uquisetum Haydemi of Carbon is closely related ; 

 Salix Bheana, Heer, of the Greenland Tertiary flora; and a species 

 of Bliamnus; from the formation of the Bad Lands: Lemna scutata, a 

 new species which I consider as identical with that represented by very 

 abundant remains at Point of Eocks ; Sapindus affinis^ Newb., of the 

 Union group ; and some remains not precisely determined, referable to 

 Scirpus and fruits. In all this flora there is no trace of any vegetable 

 remains which, by comparison with the species of the Dakota group or 

 with those of the Cretaceous of Europe, could be recognized as identical 

 with, or even related to any of them. 



How is it now with the species found associated at Point of Eocks 

 with that peculiar floating vesicular plant provisionally named Lemna 

 hulkcta f. The second species described after this Lemna is a Fiicus, com- 

 parable to two species, one described from the Miocene of Europe, the 

 other still living in the Baltic Sea. This is also found in a fossil state 

 in the Tertiary of Spitzbergen. The third is apparently a Selaginella. 

 The only fossil plant to which this has any likeness is Selaginella 

 BertJioudi of Golden. The affinity of these two species is the more con- 

 clusive as no lycopodiaceous plant has been described till now, either 

 from the Cretaceous or from the Tertiary of any country but from the 

 American Lignitic. 



The preponderance of Conifers is as marked in the group of Point of 

 Eocks as the total absence of Ferns. On this point, it is in the inverse 

 ratio of the flora of Golden, where uo remains of Conifers have been 

 found as yet, but where the Ferns abound. The flora of Black Butte is 

 on this pohit intermediate, having in equal proportion species of Ferns 

 and of Conifers. Auiong the species of this last family described from 

 Point of Eocks, one, Sequoia longifoU a, is found also at Black Butte; 

 another, represented by a lai'ge number of fine specimens. Sequoia drevi- 

 folia, is in the Miocene of Greenland, of Spitzbergen, and of the Baltic ; 

 a third. Sequoia hiformis, has not as yet been recognized elsewhere. It 

 is, however, related to Sequoia Sternhergii, of the Lower Tertiary (Oligo- 

 cene) of Europe, found at H?ering, especially at Promina, and recently 

 in the Tertiary of New Mexico. Its analogy with Sequoia Beichenbachi 

 has also been noticed in the description. The fourth species, Widdring- 

 tonia complanata, is a close relation of W. antiqua, of the same Oligoceue 

 formation of France. 



In the division of the dicotyledonous plants we find : Ficus asarifolia 

 of the Bilin Oligoceue flora, formerly described from specimens from 

 Golden ; Biospyros hrachysepala^ common in the whole thickness of the 

 Miocene and Oligoceue of Europe, found in the Tertiary of Greenland 

 alvSO, and already described from Black Butte and Sand Creek; Ficus 

 tilicefoUa, one of the most common species of the European Miocene, and 

 not less abundantly represented in the whole thickness of the American 

 Lignitic; Viburnum Wymperi^ a rare Tertiary species, described from 

 Greenland, Spitzbergen, and Black Butte. As belonging to the Miocene 

 or Oligocene of Europe, and not found before in our Lignitic, Point of 

 Eocks bas: Ficus Dalmatica, known from Promina, the lowest stage of the 

 Oligocene; Laums pra'stans and Populus melanaria,hot\i Lower Miocene 

 types. As species identical with those of other American localities, 

 but not known from Europe, we find still at Point of Eocks: Ficus 

 planicosfata, Ficus irregularis, Juglans BJiamnoides, all from Black Butte, 



