This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1879 Excerpt: . 2. Cardivm speciosum Meek & Hayden. This species has not been found so common west of the Rocky Mountains as east of them.

Besides this locality, I also found it at that of Dodds's Ranch, presently to be noticed. In these western localil ies it appears to possess all the characteristics of the typical examples. Its presence here, associated as it is with the next following species, indicates that the strata containing it are the uppermost of the series. 3. Mactra (Cymbophora) alta Meek & Hayden. So far as I am aware, no example of this species has ever been found in any other than the uppermost strata of the Fox Hills Group. It is, therefore, valuable here as indicating the highest horizon of the group; which is also indicated by the position of the strata in relation to those of the Laramie Group. For remarks on this and the two preceding species, see foregoing pages; and for figures and descriptions, see vol.

ix, U. S. Geol. Sur. Terr. 4. Anisomyon centrale Meek. The examples found here seem to be referable to this species, but they might with equal propriety be referred to some one of those which Mr.

Meek has described from the Upper Missouri River region, all of whicn are diilicult of separation. Anisomyon appears to range higher in the Fox Hills Group west of the Rocky Mountains than east of them. I have never before found it associated with either of the two foregoing species. 5. Actceon woonteri White. A single fragment was found, associated with the fossils of the foregoing list, that seems to belong to this species, which has been hitherto found only in Southern and Eastern Colorado. (, . Baculltes ovatus Say.

It has already been shown that this species is not known to range to the top of the Fox Hills Group in the Upper Missouri River region, nor i.