40 
\ ig 
BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 
220. On Semper’s method of making dry preparations. 
pp. 224-225. 
221. Notes on a collection of fishes, made by Lieut. Henry E. 
Nichols, U. 8S. N., on the west coast of Mexico, with descrip- 
tions of new species. By David S. Jordan and Charles H. 
Gilbert. 
pp. 225-233. 
229. Report on the contents of two bottles of water from the Gulf 
of Mexico, forwarded by the Smithsonian Institution. By 
W. G. Farlow. 
p. 234. 
223. Remains of the walrus (7) in Maine. By C. H. Boyd. 
pp. 234-235. 
224. Directions for collecting and preserving fish. By Tarleton H. 
Bean. 
pp. 235-238. 
225. A preliminary catalogue of the fishes of Alaskan and adjacent 
waters. By Tarleton H. Bean. 
pp. 289-272. 
226. Methods of making and preserving plaster casts. By 
Anthony Pirz. 
pp. 272-273. 
227. List of fishes collected by Lieut. Henry E. Nichols, U. 8S. N., 
in the Gulf of California and on the west coast of Lower 
California, with descriptions of four new species. By David 
S. Jordan and Charles H. Gilbert. 
pp. 273-279. 
228. On the genera of chitons. By William H. Dall. 
pp. 279-291. 
229. Notes on certain aboriginal shell-mounds on the coast of New 
Brunswick and of New England. By Spencer F. Baird. 
pp. 292-297. 
230. List of marine invertebrates, mainly from the New England 
coast, distributed by the United States National Museum. 
Series II. By Richard Rathbun. 
pp. 298-308. 
231. List of marine invertebrates from the New England coast, 
distributed by the United States National Museum. Series 
Ill. Educational series. By Richard Rathbun. 
pp. 304-307. 
232. Catalogue of a collection of Japanese woods presented to the 
United States National Museum by the University of Tokio, 
Japan. By Lester F. Ward. 
pp. 308-311. 
233. A partial bibliography of the fishes of the Pacific coast of the 
United States and of Alaska, for the year 1880. By Tarle- 
ton H. Bean. 
pp. 312-317. 
