64 
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se dil 
P. 
553. 
560. 
561. 
BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 
On the value of the fin-rays and their characteristics of 
development in the classification of the fishes, together 
with remarks on the theory on degeneration. By John A. 
Ryder. 
pp. 71-82, 1 fig. 
. On fulgurites. By George P. Merrill. 
pp. 83-91, 1 plate. 
. Descriptions of some new species of birds, supposed to be 
from the interior of Venezuela. By Robert Ridgway. 
pp. 92-94. 
3. On #ktrelata sandwichensis Ridgw. By Robert Ridgway. 
pp. 95-96. i 
. Descriptions of a new genus and species of mole, Dymecodon 
pilirostris, from Japan. By Frederick W. True. 
pp. 97-98. 
. Review of Japanese birds. 1. The woodpeckers. By Leon- 
hard Stejneger. 
pp. 99-124, 1 plate. 
. Catalogue of animals collected by the Geographical and 
Exploring Commission of the Republic of Mexico. By 
Fernando Ferrari—Perez. 
pp. 125-199. 
The British marsh-tit. By Leonhard Stejneger. 
pp. 200-201. 
Report on the mollusks collected by L. M. Turner at Ungava 
Bay, North Labrador, and from the adjacent Arctic seas. 
By William H. Dall. 
pp. 202-208, 1 plate. 
. Contributions to the natural history of the Commander 
Islands. No. 6. Report on Bering Sea Island mollusca, 
collected by Mr. Nicholas Grebnitzki. By William H. Dall. 
pp. 209-219. 
. On the occurrence of a new species of Rhinoptera (R. encenada) 
in Todos Santos Bay, Lower California. By Rosa Smith. 
p. 220. 
. An annotated list of the mammals collected by the late Charles 
L. McKay in the vicinity of Bristol Bay, Alaska. By Fred- 
erick W. True. 
pp. 221-224. 
. Notes on some fishes collected at Pensacola by Mr. Silas 
Stearns, with a description of one new species (Chatodon 
aya). By David S. Jordan. 
pp. 225-229, 
. A review of the American species of Tetraodontide. By 
David S. Jordan and Charles L. Edwards. 
pp. 230-247, 
