126 Scientific Intelligence. 
is regarded by most authors as peculiar to the Carboniferous sys 
and a large proportion of the other species mentioned as comm 
n 
tory in beds containing even a majority of well, marke 
species, we may infer that in New Mexico, as in Kansas there is a 
siderable horinige of Carboniferous and Permian types; so thai 
comes a matter of doubt and difficulty to cues at what pa 
horizon die line of demarkation should be drawn between these 
series of this country. It is to be hoped Dr. S. will continue his inva 
gations of the fossils occurring in these formations, which he 
ess have an opportunity to do, in connection with the geological 
of ao under his charge. 
. Observations on the Geology of the County of Ste. Genevieve, being 
an ae from the Report made to the Missours Geological Sur 
A 
saad . . . . LJ 
some facts having an important bearing on mooted a in the ¢ 
pee of the Lower Carboniferous Series of the Wes 0 
ries to be composed of the ge members, in the descending 
Ist. Tae — Seger cos om — eu oromierngrse by. weissres pyr 
P. su a 
80 t 
3d. Tas Sre. Genevieve Liwestone, a second Archimedes bed, in which the 
ing fossils were “found —Rhynchonella trimela, R. Wortheni, Spirif 
rng Retzi a Mar rey, Spiriferina spino. Sa, Spiri, era Let idyi, Produetus ¢ 
P. bieulent us, Murchisonia vermicula, Pinieaniles ip Fs and one 
i imedip 
4th. Tae Satst Lours Liwestone—containing Lithostrotion pig 
cidaris and Pentremites consi ides,—thickness 100 feet or 
5th. Taz Tatrp Arcatmmepes Lim st a containing Pentremiies 8 Laternfor 
rn cn himedipora, RUS sim lez, Spirigera hirsuta, + 
inane, Ryan iialie omen and Holopea Prouti,—thickoe 
et. 
6th, Tas peter Limestone (== Burtrncton Limestone), be its usual 
e lowest seat of the great Carboniferous se’ 
e Devonian rocks he recognizes the CnemuNG pee 
Grovp, and the Oriskany Sanpsroxe. Of the Sila 
r a on nting mite a The beds are alternatidiis of 
s of Descriptions of Bryozoa, from the : 
ote Western 51 States and Territories; by H. A. Pour, (TF 
ci. St. Louis, vol. i, part 3, p- 443, 1859, )-—Every geologist 
