234 The American Geologist. April, 1891 
24R. LEIDY, J. Mammalian Remains from the Southern 
States. Review of six papers in Trans. Wag. Free Ins. 
Sci. 2, 1889. Am. Geol. 5, May, 1890, p. 314. 
25R. LEIDY, J. Ibid. Review in Am. J. Sci. 39, Apr., 
1890, pp. 321-22. 
26- LEIDY, J. Mastodon and Capybara from South Caro- 
lina. Proc. Acad. Natl. Sci., Phila., 1890, pp. 184-85. 
Description of several species, including M. rugosidens 
sp. n. from the San tee beds, Reaufort Co. , S. C. 
27- LEIDY, J. Notice of Some Fossil Human Rones. Trans. 
Wag. Free Ins. Sci., 2, Dec, 1889, pp. 9-12; illustrated. 
28- LEIDY, J- Notice of Some Mammalian Remains from 
the Salt Mine of Petite Anse, Louisiana. Trans. Wag. 
Free Ins. Sci, 2, Dec, 1889, pp. 33-40; illustrated. 
Description of Mastodon, Mylodon, Equus. , also E. 
major from Rend and Fayette Cos., 111. ; and E. curoidens 
from Nicaragua. 
29- LEIDY, J. On Platvgonus, an extinct Genus allied to 
the Peccaries. Trans. Wag. Free Ins. Sci., 2, Dec, 
1889, pp. 41-50; illustrated. 
Treating principally on P. compressus from near 
Rochester. 
30. MARSH, O- C Additional Characters of Ceratopsidae, 
with notice of New Cretaceous Dinosaurs. Am. J. Sci. , 
39, May, 1890, pp. 418-26; illustrated. 
Analysis of Triceratops and description of the follow- 
ing new dinosaurs. Triceratops sulcatus sp. n. from 
Ceratops beds of Wyoming, and Tracliodon longiceps sp. 
n. from the Laramie of W}'oming. Hadrosaurus agilis 
Msh. is made to represent a new genus, Claosaurus (Pter- 
anodon beds of Kansas). Finally, a brief synopsis (after 
Msh.) of Cretaceous Dinosaurs. 
31 R. MARSH, O. C Cretaceous Reptiles from the Western 
States. Geological Magazine, 3, vol. vii, pp. 1-5. Re- 
view in Am. Geol, 5, March, 1890, pp. 180-81. 
32- MARSH, O- C Description of New Dinosaurian Rep- 
tiles. Am. J. Sci. 39, Jan., 1890, pp. 81-86; illus- 
trated. 
The following are described as new, Triceratops ser- 
ratus sp. n. from the "Ceratops" beds of Wyoming. 
