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BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 
. List of plants from Lower California sent to the Smithsonian 
Institution by Lieut. Charles F. Pond, U. 8. Navy. By 
George Vasey. 
p. 368. 
A study of the American species of Vertigo contained in the 
U. 8S. National Museum, with the description of a new sub- 
genus of Pupide. By V. Sterki. 
pp. 369-880, 1 plate, 6 figs. 
. On the snakes of Florida. By E. D. Cope. 
pp. 381-394, 1 plate. 
. Catalogue of batrachia and reptilia brought by William Taylor 
from San Diego, Texas. By E. D. Cope. 
pp. 395-398, 1 plate. 
. On the Eutzenie of southeastern Indiana. By E. D. Cope. 
pp. 399-401, 1 plate. 
. The stone age at Mount Vernon. By Otis T. Mason. 
p. 402. 
. Catalogue of the myriapods of Indiana. By Charles H. Boll- 
man. 
pp. 403-410. 
. List of fishes now in the U. 8. National Museum, collected in 
Nicaragua by Dr. Louis F. H. Birt. By David S. Jordan. 
pp. 411-412. 
. Notes on some albino birds presented to the U.S. National 
Museum, with some remarks on albinism. By Wirt Rob- 
inson. 
pp. 413-416. 
Description of a new species of deer, Cartacus clavatus, from 
Central America. By Frederick W. True. 
pp. 417-424. 
Review of Japanese birds. WIII. The nutcracker (Vuctfraga 
caryocatactes macrorhynchos). By Leonhard Stejneger. 
pp. 425-482. 
The single-headed drum of the Naskopie (Nagnagnot) Indians, 
Ungava district, Hudson Bay territory. By Lucien M. 
Turner. 
pp. 483-434. 
. Notes on a collection of fishes from the Maumee Valley, Ohio. 
By Seth E. Meek. 
pp. 435-440. 
. Description of new genera and species of fossils from the Mid- 
dle Cambrian. By Charles D. Walcott. 
pp. 441-446, 1 fig. 
. A simple method of measuring the thickness of inclined strata. 
By Charles D. Walcott. 
pp. 447-448, 1 fig. 
