a. 
Mesozoic and Cenozoic Geology and Paleontology. 39 
Dr. Joseph Leidy* described, from the Bridger Eocene of Wyoming, 
Anosteira ornata, Hybemys arenarius, Testudo corsoni, Emys carteré, 
Baena undata, Trogosus vetulus, now Anchippodus vetulus, Sinopa 
rapax, Paleosyops major, Hyrachyus eximius, Paramys delicatus, P. 
delicatior, and P. delicatissimus, all now Plesiarctomys, and Mysops 
minimus. He described from the Miocene of Alkali flats, Oregon, 
Rhinoceras pacificus, and from Crooked river, Stylemys oregonensis, 
now Testudo oregonensis. 
Prof. E. D. Copey described, from the Post-pliocene occurring in a 
limestone fissure in Chester county, Pennsylvania, Megalonyx loxodon, 
M. sphenodon, M. tortulus, M. wheatleyi, Sciurus calycinus, Arvicola 
speothen, A. tetradelta, A. didelta, A. involuta, A. sigmodus, A. hiatt- 
dens, Erithizon cloacinum, and Praotherium palatinum.- He described 
from the Miocene near Tuxtla, Chiapas, Mexico, Prymnetes longiven- 
ter. 
Prof. O. C. Marsht{ described, from the Green river basin west of the 
Rocky Mountains, Boavus agilis, B. brevis, and B. occidentalis; from 
' the Bridger Eocene of Wyoming, Limnophis crassus, Lithophis sar- 
genti, Crocodilus affinis, C. brevicollis, C. grinnelli, C. liodon, C. zipho- 
don, now Limnosaurus ziphodon, Glyptosaurus anceps, G. nodosus, G. 
ocellatus, G. sylvestris, Titanotherium (?) anceps, Lophiodon affinis, L. 
bairdianus, L.nanus, L. pumilis, Anchitherium gracile, now (?) Orohip- 
pus gracilis, Lophiotherium ballardi, Hlotherium lentum, Platygonus 
zieglert, Hyopsodus gracilis, Limnotherium elegans, L. tyrannus, Sct- 
uravus nitidus, S. parvidens, S. undans, Triacodon fallax, Canis mon- 
tanus, Vulpavus palustris, and Bubo leptosteus. 
He described from the Miocene at Scott's Bluff, on North Platte 
river, Nebraska, Amphicyon angustidens; from Northern Colorado, 
Meleagris antiquus; from Cumberland county, New Jersey,§ Lophio- 
don validus, now Tapiravus validus; and named, but did not describe, 
from Wyoming, Amu depressa, A. newberryana, Lepidosteus glaber, 
and LZ. whitney. Also from the Pliocene sands, near the headwaters 
of the Loup Fork river, Nebraska, (||) Platygonus striatus, Arctomys 
vetus, Geomys bisuicatus, Aquila dananus; and from Oregon, Platy- 
gonus condonit, and Dicotyles hesperius. 
* Proc. Acad. Nat. Sci. 
+ Proc. Am. Phil. Soc., vol. xii. 
t Am. Jour. Sci. and Arts, 3d series, vol. i. & il. 
§ Proc. Acad. Nat. Sci. 
(||) Am. Jour. Sci. and Arts, 3d series, vol. ii. 
