es 
305* sd 
APPENDIX. 
1, On Permian Strata in Kansas Territory; by Prof. G. C. Swattow. 
(From a letter to J. D. Dana, dated Columbia, Missouri, Feb. 16, 1858.) 
Ihave just finished the examination of a collection of fossils from 
Kansas Territory, made by Maj. Hawn, who was formerly connected with 
our Survey. The larger part of the collection is from the Upper Coal 
Measures; but by far the most interesting part can not be referred to the 
oe, or to any other formation heretofore known to exist in the 
est. : 
From the beds in doubt there was but one known Carboniferous species, 
Terebratula subtilita of Hall. It is quite certain they are not Cretaceous, 
After a somewhat careful comparison with the Permian fossils of Russia, 
We are satisfied that they are Permian. ; 
ree out of the four species of corals, are without doubt Permian. 
Thamnicus dubius, King, is certainly in our collection. ; 
' Thamnicus. Species undetermined, but identical with a Permian spe- 
imen figured in the Geol. Trans., 2d Series, voly iii, pl. x11, g. 7. 
_ Fenestella retiformis, King, Our specimens are identical with the Rus- 
g : 
_ an species referred doubtfully to this, by Mr. Lonsdale, Geol. Russia, p. 630. 
7 u and 8. We have 
chizodus Rossicus, Vern., Russ. pl. xrx, figs. 7 
Many specimens of this Permian species. Both varieties and 
mediate forms are represented. 
Avicula antiqua. Geol. Russ., pl. xx, fig. 13. : 
_ Productus horrescens, Vern., Geol. Russ. pl. xvi, fig. 1. Our collection 
contains specimens which are more nearly allied to these than to any 
other known species, sae TOE . 
@ also have species which are very nearly if not quite identical with 
Murchisonia subangulata, Vern., Mytilus Pallasi, Vern., Solemya biar- 
mica, Vern., Ostodemia Kutorgana, Vern., of the Permian in Russia and 
Cardinia Listeri of the English Lias. We also have one or two species 
‘A onolis, a genus seldom, if ever, extending down into the Carbon- 
erous, 
EToucey, Secretary of the Navy, dated Feb. 18, 1858, Prof. J. M. Gilliss 
‘ : : m 
commonly adopted ; corresponding to a mean distance of the Sun from 
earth of 96,160,000 statute miles. 
SECOND SERIES, VOL, XXV, NO. 74.—-MARCH, 1858. 
