40 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 



P. 220. On Semper's method of making dry px-eparations. 



pp. 224-225. 



P. 221. Notes on a collection of fishes, made by Lieut. Henry E. 

 Nichols, U. S. N. , on the west coast of Mexicb, with descrip- 

 tions of new species. By David S. Jordan and Charles H. 

 Gilbert. 



pp. 225-233. 



P. 222. 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. 



P. 223. Remains of the walrus (?) in Maine. By C. H. Boyd. 



pp. 234-235. 



P. 224. Directions for collecting and preserving fish. By Tarleton H. 

 Bean. 



pp. 235-238. 



P. 225. A preliminary catalogue of the fishes of Alaskan and adjacent 

 waters. By Tarleton H. Bean. 



pp. 239-272. 



P. 226. Methods of making and preserving plaster casts. By 

 Anthony Pirz. 



pp. 272-278. 



P. 227. List of fishes collected by Lieut. Henry E. Nichols, U. S. N., 

 in the Gulf of California and on the west coast of Lower 

 California, with descriptions of four new soecies. By David 

 S. Jordan and Charles H. Gilbert. 



pp. 273-279. 



P. 228. On the genera of chitons. By William H. Dall. 



pp. 279-291. 



P. 229. Notes on certain aboriginal shell-mounds on the coast of New 

 Brunswick and of New England. By Spencer F. Baird. 



pp. 292-297. 



P. 230. List of marine invertebrates, mainly from the New England 

 coast, distributed by the United States National Museum. 

 Series II. By Richard Rathbun. 



pp. 298-303. 



P. 231. List of marine invertebrates from the New England coast, 

 distributed by the United States National Museum. Series 

 III. Educational series. By Richard Rathbun. 



pp. 304r-307. 



P. 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. 808-311. 



P. 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. 



