48 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 



P. 384. Description of two new .species of fishes {Mijrophlx rafer and 

 Ghloroscomhrus orgueta) from Panama. By David S. Jordan 

 and Charles H. Gilbert. 



pp. 645-647. 



P. 335. Description of a new eel {Sldera castanea)^ from Mazatlan, 

 Mexico. By David S. Jordan and Charles H. Gilbert. 



pp. 647-648. 



P. 336. On the nomenclature of the g-enus OpldchtliijH. By David S. 

 Jordan and Charles H. Gilbert. 



pp. 648-651. 



P. 337. On the life coloration of the 3'Oung of Pomacentrus ruhicun- 

 dus. By Rosa Smith. 



pp. 652-653. 



P. 338. On a cinnamon bear from Pennsylvania. By Frederick W. 

 True. 



pp. 653-656. 



P. 339. Description of a new petrol from Alaska. By Robert Ridg- 

 way. 



pp. 656-658. 



P. 340. Description of a species of whitefish, Coregonus hoy'i (Gill) 

 Jordan, called "smelt" in some parts of New York. By 

 Tarleton H. Bean. 



pp. 658-660. 



P. 341. Note on a Potsdam sandstone, or conglomerate, from Berks 

 County, Pennsylvania. By George P. Merrill. 



pp. 660 661. 



P. 342. Description of a new species of Alejrldosaurus {A. oiscvlajpius)^ 

 from Alaska. By Tarleton H. Bean. 



pp. 661-663. 



VOLUME VI, CONTAIIVING PAPERS 343-396. 



Department of the Interior: | U. S. National Museum. | | Pro- 

 ceedings I of the I United States National Museum. | Vol. VI. | 

 1883. I I Published under the direction of the Smith- 

 sonian Institution. | | Washington: | Government Printing 



Office. I 1884. 



8vo., pp. vii, 1-530,1 14 pLs., 6 figs. 



P. 343. Prcliminar}' report on the l)rachyura and anomura di'edged 

 in deep water off the south coast of New England by the 

 United States Fish Commission in 1880, 1881, and 1882. By 

 Sidney I. Smith. 



pp. 1-57, 6 pis. 



P. 344. Contributions to the history of the Commander Islands. 

 No. 1. Notes on the natural history, including descriptions 

 of new cetaceans. By Leonhard Stejneger. 



pp. 58-89. 



1 Includes circulars 19-23. 



