North American Vertebrate Palceontology. 233- 
15. COPE, E. D. The Silver Lake of Oregon and its Region. 
Am. Nat. 23, Nov., 1889, pp. 970-82; illustrated. 
Principally geological. Gives list of vertebrates from 
this locality. 
16. COPE and UNDERWOOD. A Bison at Syracuse, N. 
Y. Am. Nat. 24, Oct., 1890, p. 953. 
Description of skull found ten feet below surface in 
black swamp muck underlaid by clay. Cope determined 
it to be Bus americanus. Locality appears to be the 
most northern, east of the Mississippi, so far discovered. 
1 7. DAWSON, J. W. Note on a Fossil Fish from Green's 
creek on the Ottawa. Can. Rec. of Sci. , vol. iv, No. 2, 
April, 1890, pp. 86-88. 
Remains from the Pleistocene nodules. 
18- EYERMAN, J. Bibliography of North American Verte- 
brate Palseontolog}' for the year 1890. Am. Geol. , 5, 
April, 1890, pp. 250-53. 
19. HITCHCOCK, C. H. Recent Progress in Ichnology. 
Proc. Bos. Soc. Nat. Hist, 24, pp. 117-27. 
20- LEIDY, J. Description of Mammalian Remains from a 
Rock crevice in Florida. Trans, Wag. Free Ins. Sci. , 2, 
Dec, 1889, pp. 13-18; illustrated. 
Description of Machairodus floridanus, sp. n. Equus 
Auchenia and Eleplias from Ocala, Marion Co. , and Equus 
fraternus from Caloosahatchie river, Fla. 
21. LEIDY, J. Description of Vertebrate Remains from 
Peace creek, Fla. Trans. Wag. Free Ins. Sci. , 2, Dec. , 
1889, pp, 19-32; illustrated. 
Description of nineteen species, including Testudo 
crassiscutata sp. n. 
22- LEIDY, J. Fossil Vertebrates from Florida. Proc. Acad. 
Natl. Sci. Phila., 1890, pp. 64-65. 
Brief description of bones and teeth of Mastodon flor- 
idanus, Rhinoceros j^'otcrus and Auchenia major, from 
Archer, Fla. 
23- LEIDY, J. Hippotherium and Rhinoceros from Florida. 
Proc. Acad. Natl. Sci., Phila., 1890, pp. 182-83; illus- 
trated. 
Description of five species, including II. princeps, sp. 
n.j and R. longipes, sp. n. , from Peace Creek, Fla. 
