On the Lower Cretaceous beds of Kansas and Nebraska, etc. 219 
canthia virginica, Spiderwort; 5th, Rosa Carolina, swamp rose; 
_ 8th, Sambucus Canadensis, Elder; 11th, Vitis cordifolia, frost 
grape; 12th, Rosa multiflora, prariensis; 13th, Triosteum perfo- 
hatum, feverwort, Rhus typhina, sumach; 25th, Wheat harvest 
ins in warm exposures; 28th, Asclepias cornuti, milkweed. 
July 6th, Lobelia spicata; 15th, Rhus radicans, trumpet creeper; 
16th, June-eating apple ripe; 17th, Sweet bough apple; 18th, 
Blackberry ripe; 26th, Cassia Marylandica, wild senna, in flower. 
August 11th, Watermelon ripe in open fields; 19th, Sweet 
potatoe in market, good size. 
Marietta, Ohio, January 5th, 1859. 
Art. XXVIL—Remarks on the Lower Cretaceous beds of Kansas 
and Nebraska; by ¥. B. Mrrx and F. V. HAYDEN. 
(Extracted from the Proceedings Acad. Nat. Sci., Philad, Dee. 1858, with addi- 
tions by the authors.) 
_THE Cretaceous System as developed in Nebraska, is clearly 
divisible into five distinct formations, which have, for conven- 
lence, been numbered 1, 2, 3, &c., from the base upwards. Al- 
though at first entertaining some doubts as to whether No. 1, or 
the lowest formation, might not be older than Cretaceous, we 
always placed it provisionally, in our published sections, in the 
syste 
sa ject, we became satisfied from the modern affinities of numer- 
Sus dicotyledonous leaves found in this formation, that we 
hazarded little in regarding it as a settled question that it could 
bie es Marcou, in his work on the “ Geology of North Amer-” 
ica," page 143, refers it to the New Red Sandstone, and in a 
sUdsequent publication® he places it in the Jurassic; while some 
investigators in this country also, inclined to the opinion that it 
must be Triassic. In the midst of these conflicting opinions, 
although satisfied we were right, we wished, in order to remove 
a oubts from the minds of others, to have the opinion of some 
Ioywhich we hive given little attention,) respecting the fossil 
ves on which we mainly based our views in regard to the age 
ponte pour servir a une description geologique des Montagnes Rocheuses, 
; 
4 
