O74 Review of Saporta’s Work 
the lower Lignitic strata of the Western territories, the essential 
characters of a number of species have been recognized as 
intimately related to, even identical with, those of some species _ 
ora of Sezanne, and from this referred to the Eocene. — 
Count Saporta considers this question, on p. 221 of his book, as 
follows: “The Ligoitic flora of a vast Tertiary formation of — 
North America, rich in combustible mineral, which occupies — 
an immense area in the new Territories in the West, Colorado, 
: ming, ete., is not yet sufficiently known. From the — 
materials collected under the direction of the Geological Sur- — 
veys of the United States, the plants appear referable to three — 
different groups of the Tertiary, the lowest evidently corres- — 
nding to our Eocene. The relation of this group with the — 
Paleocene of Europe is evident, notwithstanding the great geo- — 
graphical distance of the localities. This relation is manifested 
to a species of the Paleocene of Gelinden. But it has also an 
Ottelia (tropical type), which is closely allied to another species 
of this genus, O. Parisiensis, of the Eocene of Paris (roca 
dero). This local formation corresponds by its fruits, Nipadiles: 
to that of the Sheppey beds of the Eocene of England. Along 
with Sequoia longifolia, which, according to Saporta, recalls & 
