---- On the genus _Gnathanacanthus_ of Bleeker. By T. Gill. From Proceed. U.S. Nat. Mus. v. xiv, pp. 701-704. [No. 885.] 4pp. ---- Notes on the _Tetraodontoidea._ By T. Gill. From Proceed. U.S. Nat. Mus. v. xiv, pp. 705-720. [No. 886.] Washington. 15pp., 1 pl. ---- Preliminary descriptions of 37 new species of hermit crabs of the genus _Eupagurus_ in the U.S. Nat. Mus. By J. E. Benedict. From Proc. U.S. Nat. Mus. v. xv, pp. 1-26. [No. 887.] Washington, 1892. 26pp. ---- Description of two apparently new fly catchers from Costa Rica. By G. K. Cherrie. From Proc. U.S. Nat. Mus. v. xv, pp. 27-28. [No. 888.] 2pp. ---- Report upon the condition and progress of the U.S. Nat. Museum during the year ending June 30, 1889. By G. B. Goode. From the report of the Nat. Mus. 1888-'89, pp. 1-277. Washington, 1891. 277pp., 4 pls. .75 ---- List of institutions and foreign and domestic libraries to which it is desired to send future publications of the Nat. Museum. From the report of the Nat. Museum, 1888-'89, pp. 191-277. Washington, 1891. 89pp. ---- The museums of the future. By G. B. Goode. From the report of the Nat. Museum, 1888-'89, pp. 427-445. Washington, 1891. 21pp. .50 ---- Te Pito te Henua, or Easter Island. By W. J. Thomson. From report of the Nat. Mus., 1888-'89, pp. 447-552. Washington, 1891. 106pp. 49 pls. ---- Aboriginal skin dressing; a study based on material in the U.S. Nat Mus. By O. T. Mason. From the report of the Nat. Mus. 1888-'89, pp. 553-589. Washington, 1891. 37pp., 33 pls. ---- The puma or American lion. (_Felis concolor_ of Linnæus.) By F. W. True. From report of the Nat. Mus. for 1888-'89, pp. 591-608. Washington, 1891. 18pp., 1 pl. ---- Animals recently extinct or threatened with extermination, as represented in the collections of the U.S. Nat. Museum. By F. A. Lucas. From report of the Nat. Mus. for 1888-'89, pp. 609-649. Washington, 1891. 41pp., 11 pls. ---- The development of the American rail and track, as illustrated by the collection in the U.S. Nat. Museum. By J. E. Watkins. From report of the Nat. Mus. 1888-'89, pp. 651-708. Washington, 1891. 59pp. ---- Explorations in Newfoundland and Labrador in 1887, made in connection with the cruise of the U.S. Fish Commission schooner _Grampus_. By F. A. Lucus. From report of the Nat. Museum, 1888-'89, pp. 709-728. Washington, 1891. 21pp., 1 pl. ---- On the bronze buddha in the U.S. Nat. Museum. By C. DeKay. From the report of the Nat. Museum, 1888-'89, pp. 729-735. Washington, 1891. 8pp., 1 pl. ---- Preliminary handbook of the department of geology of the U.S. Nat. Museum. By G. P. Merrill. From report of the Nat. Museum, 1888-'89. Appendix, pp. 1-50. Washington, 1891. 52pp.