62 ON THE GEOLOGY AND NATURAL HISTORY 
spinous processes. They are as much as from three to four inches in length, nearly or quite straight, and not 
flattened or compressed. 
Division No. 26, Manhattan, and in same position on Cottonwood creek. 
BRACHIOPODA. 
Discina tenuilineata, Meek and Hayden, Proceedings Acad. Nat. Sci. Pa. p. 25, January, 1859. Cottonwood 
creek, Division 16. 
Discina Manhattanensis, Meek and Hayden, Proceedings Acad. Nat. Sci. Pa. p. 25, January, 1859. Found 
in great numbers in Division No. 37, opposite Manhattan on Kansas river. 
Productus splendens (2), Norwood and Pratten, Jour. Acad. Nat. Sci. Phila. N.S. vol. ii, pl. fig. 5. We 
refer this shell to the above species with some doubt; it is always smaller than the figure given by Norwood and 
Pratten, and rather more convex over the visceral region of the larger valve, while the smaller valve appears to 
want the band-like flattening around the border mentioned in the description of P. splendens. The ears extend 
beyond the body of the shell, are distinctly vaulted, and rarely have more than one spine on each, often none. 
The spines, however, are more numerous over the surface of the larger valve, being in this respect more like P. 
muricatus N. and P., but both valves want the concentric wrinkles represented in the figures of that species. 
This neat little Productus is found in great numbers between Fort Riley and Manhattan, as well as at the latter 
place, in Division No. 34; also at various horizons below that in the upper Coal measures of Kansas ; also in Mis- 
souri, and along the Pecos river, in New Mexico. 
Productus Norwoodi, Swallow, Trans. Acad. Sci. St. Louis, vol. i, p. 182. A few specimens of this species in 
our possession have the extreme point of the beak of the larger valve flattened or truncate, as though it had in the 
young state been attached to some marine body by that part of the shell. We have also in several instances found 
other shells associated with this species, with small discs not more than 0.20 inch in diameter, attached by the 
whole surface, as well as by a series of small spines seen radiating from the margin. May not these little bodies 
be the young of this species ? 
We think the specimen figured by Prof. Marcou in his work on the Geology of North America, plate 6, fic. 1, 
as P. pustulosus, is the same as the above species, and quite distinct from P. pustulosus. It occurs in Kansas at 
various horizons from No. 14 far down in the upper Coal measures. We found it at Fort Riley and numerous 
places between there and the Missouri, as well as at Leavenworth city. 
Productus Rogersi, Norwood and Pratten, Jour. Acad. Nat. Sci. Phil. N. 8. vol. iii, page 9, pl. 1, fig. 3. This 
species is nearly related to the last, and when the shell is exfoliated, may be easily confounded with it. P. Nor- 
woodi, however, appears never to have the distinct concentric wrinkles of this species, nor do the pustules at the 
base of the spines have the tendency to elongate into indistinct ribs asin P. Royerst. Prof. Marcou has figured 
in N. Am. Geol. pl. 5, fig. 6, as Productus scabriculus, a shell very like this. 
Kansas valley below the mouth of Blue river, in upper Coal measures ; at the Pecos villages in the Coal measures 
or upper Carboniferous limestone. 
Productus pustulosus (?), Phillips’s Geol. Yorkshire, vol. ii, p. 316, pl. 7, fig. 15. We have a specimen agree- 
ing very nearly with this species in its external markings, but it is much narrower, and the beak of the larger 
valve more extended, in which respect it differs quite as much from P. punctatus. 
Near Steamboat landing at Leavenworth city, in Coal measures. 
Productus Prattenianus, Norwood, Jour. Acad. Nat. Sci. Phil. N. S. vol. iii, p. 17, pl. 1, fig. 10. In Coal 
measures at Indian creek and at Leavenworth city. 
Productus Calhounianus, Swallow, Trans. Acad. Sci. St. Louis, vol. i, p. 181. This fine large shell is scarcely 
