106 
ON THE GEOLOGY AND NATURAL HISTORY 
VERTICAL SECTION, continued. 
Be 
SuBDIVISIONS. Locaxiries. BE 
Light gray fine sand, with more or less calca-| Old Woman’s creek; also in many lo- 
. |reous matter, passing down into an ash-colored | calities along the valley of the South fork 
= plastic clay, with large quantities of quartz grains| of Shyenne. Best development on Sage 
als disseminated through it, sometimes forming aggre-| and Bear creeks. Seen at several locali- 3 
z, q | gated masses like quartzose sandstone cemented | ties in the valley of White river. S 
SS -E | with plastic clay; then an ash-colored clay with a S 
S a greenish tinge, underlaid at base by a light gray g 
a a and ferruginous silicious sand and gravel, with 2 
= | pinkish bands. Great quantities of silex in the 
form of seams all through the beds. Titanotherium 
Bed. 
p ie Cretaceous beds 5 and 4, with their usual litho-| Exposed underneath the tertiary beds 
Bl & logical characters and fossils. on the South fork of Shyenne and its 
A oe southern branches, also in White river 
a 2 valley near its source. 
S) 
CATALOGUE OF ALL THE, FOSSILS HITHERTO DESCRIBED, FROM THE TERTIARY FORMATIONS OF WHITE 
AND NIOBRARA RIVERS, WITH A TABLE SHOWING THEIR STRATIGRAPHICAL POSITION. 
Beds in ascending order. Beds in ascending order. 
A. B.C. D.E.F. A. B.C. D.E.F. 
RUMINANTIA. MULTUNGULA. 
1. Oreodon gracilis, Leidy, * KX 21. Cheropotamus (Hyopotamus) Americanus, L. * 
2. Oreodon Culbertsoni, Leidy, * * * 22. Entelodon Mortoni, Leidy, . : 0 5 we a8 
3. Oreodon major, Leidy, . * 23. Entelodon ingens, Leidy, . 0 5 5 oe fe 
4. Agriocharus major, Leidy, ns 24. Titanotherium Proutt, Leidy,  . ° 0 8 
5. Agriocherus antiquius, Leidy, k * 26. Paleocherus probus, Leidy, . 0 9 SY gave! 
6. Poebrotherium Wilsoni, Leidy, * 27. Leptocherus speetabilis, Leidy,  . 5 oS 
7. Leptomeryx Evansi, Leidy, * * 28. Rhinoceros occidentalis, Leidy, * * KK 
8. Leptauchenia decora, Leidy, . e 0 * 29. Rhinoceros (Hyracodon) Nebrascensis, Leidy, * * * * 
9. Leptaruchenta major, Leidy, . K 30. Rhinoceros crassus, Leidy, . 0 D 5 : * 
10. Protomeryx Halli, Leidy, * 31. Mastodon (Tetralophodon) merificus, Leidy, . * 
11. Merycodus necatus, Leidy, . 6 0 . * | 32. Llephas (Euelephas) imperator, Leidy, : * 
12. Megalomeryx Niobrahensis, Leidy, 0 5 * 
13. Merychocherus proprius, Leidy, * SOLIDUNGULA. 
14, Procamelus occidentalis, Leidy, * | 33. Hipparion, S. Hippotherium occidentale, L. . * 
15. Procamelus robustus, Leidy, * | 34, Hipparion, S. Hippotherium spectosum, lL. . * 
16. Procamelus gracilis, Leidy, . * | 35. Anchitherium Bairdi, Leidy, 0 : aq SS 
17. Merychyus elegans, Leidy, * | 36. Anchitherium (Hypohippus) affinis, Leidy, . * 
18. Merychyus medius, Leidy, * | 387. Anchitheriwm (Parahippus) cognatus, Leidy, 
19. Merychyus major, Leidy, * | 38. Merychippus insignis, Leidy, , : 6 * 
20. Cervus Warrent, Leidy, * | 39. Merychippus mirabilis, Leidy,  . : : * 
