64. ON THE GEOLOGY AND NATURAL HISTORY 
Quite common in Division No. 94 at Manhattan and at several localities between there and the Missouri, in the 
upper Coal Measures. Prof. Marcou cites it as a mountain limestone species, but we know nothing of its exis- 
tence in rocks of that age. This species was also found by Mr. Marcou near Great Salt Lake city, associated with 
Retzia Mormonii, Terebratula Royssii, and S. subtilita. Also in the limestones near Fort Laramie. 
Retzia Mormoni (Terebratula Mormonii, Marcou, Geol. N. A. p. 51, pl. vi, f. 11). We found this species 
quite abundant in Division 37 at Manhattan, where it is associated with the last. It also ranges far below this in 
the upper Coal measures between Manhattan and the Missouri, being quite common near the summits of the hills 
back of Leavenworth city. Dr. B. F. Shumard has described a species in the Trans. Acad. Sci. St Louis, under 
the name of Retzia punctilifera, which we suspect may possibly be a variety of the above; but as he describes it 
as having usually in the dorsal valve “a moderately wide, shallow sinus, which extends from the front nearly to 
the beak,” and the species before us, of which we have many specimens, has no traces of a sinus, we are left in 
doubt. In other respects his description agrees exactly with our shell, and he also states that he has it from K. T. 
Prof. Marcou found this species at the Salt Lake city, Utah, in a rock he refers to the mountain limestone. We 
have never seen it from below the Coal measures. It is also found near Fort Laramie, Nebraska, and in the Car- 
boniferous limestones of the Black hills. 
Spirifer Kentuckensis, Shumard, Geol. Survey of Missouri, part 2, p. 208. Found in upper Coal measures near 
the top of bluffs, back of Fort Leavenworth, also near the landing at Leavenworth city, and at other localities 
between the Missouri and Blue river. 
Spirifer cameratus, Morton, American Jour. Sci. vol. xxix, p. 150, pl. 11, fig. 8. This is the same species, 
as has been determined by Prof. Hall, described by Dr. Roemer as S. Meusebuchanus (Kreid yon Texas, p. 88, 
pl. 11, fig. 7), and subsequently by himself as S. triplicatus, in Stansbury’s Rept. p. 420, pl. 4, fig. 5. Prof. 
Marcou has recently figured it in his work on the Geol. North America, p. 49, pl. 8, fig, 8, as a variety of Spiri- 
Jer striatus, Martin, from which it is quite distinct. He found it at Pecos village in a rock he refers to the lower 
Carboniferous or mountain limestone. It hasa great geographical range, being common in the Coal measures from 
Pennsylvania to the Rocky mountains, and from Nebraska to New Mexico; we have never seen it, however, from 
lower Carboniferous rocks. It is very common near Bellevue, Nebraska, at Fort Laramie, and in the Black hills. 
Spirifer hemiplicata, Hall. Stansbury’s Report, p. 409, pl. 4, fig. 3. Upper Coal measures near summit of 
hills back of Leavenworth, and at other localities between there and Blue river. 
Spirifer lineatus. Anomvites lincatus, Martin. Spirifer lineatus of Phillips. Geol. Yorks. ii, p. 219, pl. 10, 
fig. 17, and of other authors. We have, from near Leavenworth landing, in the Coal measures, a Spirifer, appa- 
rently identical with the above. It appears not to range very high in the upper Coal measures of Kansas. 
Sptrifer 
Spirifer, similar, in some respects, to S. lineatus, but apparently more like Murtinia Clannyana, King, from the 
Permian of England. 
In Division No. 12, above Fort Riley, we found a few imperfect specimens of a small, smooth 
Spirifer planoconvexa, Shumard. Geol. Report, Missouri, 2d part, p. 202. We found this handsome little 
shell quite abundant in the upper Coal measures (Divisions 34 and 37) at Manhattan; also at Juniata, on Big 
Blue riyer, and near summit of hills back of Leavenworth city. 
Spirigera subtilita. (Terebratula subtilita, Hall. Stansbury’s Report, p. 409, pl. 4, figs. 1-2.) Spirigera 
subtilita, of Dr. George Shumard. Trans. St. Louis Acad. Sci. vol. i. 
This is a very abundant species in Kansas; we found it ranging up at least as far as Division No. 37, at Man- 
hattan, and met with some obscure forms resembling it still higher in the series. From these horizons, it ranges 
far down in the other members of the Coal measures. Several of our specimens collected at Leavenworth city show 
that it was provided with internal spiral appendages, as in the Spirifer, and consequently cannot remain in the 
