On the Lower Cretaceous beds of Kansas and Nebraska, etc. 221 
Cretaceous genus (Credneria,) the nervation being obscure, and 
the others more like Tertiary forms than anything known in 
the Cretaceous of the old world, he was inclined to the opinion 
that they are Tertiary. | 
Along with Professor Heer’s letter, we also received a printed 
pamphlet, entitled “ Letters on some points of the Geology of ae 
(3 fi 
B ESSE essrs. . 
Meck and F. V. Hayden, by Jules Marcou.” In this pamphlet 
Professor Marcou quotes Professor Heer’s conclusions in rega 
to our fossil plants, and expresses the opinion that No. 1, of the 
ebraska section, is both Miocene and Jurassic, or in other 
words, that we have included in it strata belonging to each of 
these two widely different geological epochs. 
aving a very high regard for Professor Heer’s opinions on 
any question in fossil botany, where he has had an opportuni 
to examine the Specimens themselves, or to study good figures 
and descriptions, we are quite sure, had the whole collection 
been submitted to him, instead of mere sketches of a few of the 
— his opinion would have been very different. At an 
We know it passes, as already stated, beneath at least eight 
hundred feet of Cretaceous strata. This is not mere conjecture, 
Persons at numerous localities. ° : ai 
in order to satisfy others that we are not mistaken in this, we 
mill give a few of the many facts in our possession, bearing on this 
near Smoky Hill river, in, Kansas, latitude 38° 80’ north, and _.- 
re. W 
longitude $7° 80” west. He 
ie vchworth. At this locality, however, we saw no rocks over- 
Pa Mg it, and consequently have no stratigraphical evidence that 
ba same rock seen by us at other localities under Cretaceous 
} but our lithological and paleontological evidence is quite 
i 
wise Missonzi, and contains numerous fossil leaves, some of 
“Seco ©, Wentical with those occurring in No. 1, at the last 
8, Vor. XXVII, No. 80.—MARCH, 1859. 
29 ; 
F 
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