INDEX. 



va. 



Sciajninas, revision of the genera of, by 

 T. Gill, 79. 



Scolopendra, descriptions of new spe- 

 cies of, by H\ C. Wood, Jr., 10. 



Secretary, Recording, report of, 526. 



Shad, remarks on the food of, by Dr. 

 Leidy, 2. 



Shells, descriptions of new, from the 

 coast of S. Carolina, 41 ; notice of, 

 from Hudson's Bay, 97. 



Shizostoma, description of new species 

 of, by I. Lea, 54 ; remarks of Dr. 

 Showalter on, 56. 



Sho waiter, Dr., of Alabama, remarks 

 on Shizostoma, 56. 



Sillaginoidea?, synopsis of, by T. Gill, 

 501. 



Slack, Dr. J. H., remarks on some speci- 

 mens of Mammalia, 24 ; on a species 

 of the Lenmridae, called Otolicnus 

 apicalis by DuChaillu, 153 ; descrip- 

 tion of a new species of Rodent of the 

 genus Spermophilus, 311, 314 ; de- 

 scription of a new Quadrumanous 

 Mammal of the genus Midas, 391, 

 463 ; Guide to the collection of the 

 Academy, 391, 522. 



Spackman, Dr. George, announcement 

 of the death of, 205. 



Spermophilus, description of a new 

 species of, by J. H. Slack, M. D., 314. 



Suckley, George, M. D., U. S. A., de- 

 scription of a new species of Amer. 

 Grouse, 334, 361. 



Sphajrium, descriptions of new species 

 of, by T. Prime, 125 ; monograph of 

 the species of, of N. and S. America. 

 by T. Prime, 402 ; descriptions of 

 three new species of, by T. Prime, 

 414. 



Sphserodactylus, by E. D. Cope, 494. 



Squalus americanus, referring it to the 

 genus Odontaspis, by C. C. Abbott, 

 399. 



Stewardson, Thos., M. D., remarks on 

 the Ailanthus silk worm, 525. 



Stimpson, W., on marine shells from 

 Hudson's Bay, and Pleistocene de- 



posit on the shore of James' Bay, 75, 

 97 ; notes on Decapod Crustacea, 334, 

 372, 



Strephobasis, description of, by I. Lea, 

 96. 



Sarothrodus maculo-cinctus, new spe- 

 cies described by T. Gill, 99. 



Tiedeman, Prof. F., announcement of 

 the death of, 56. 



Thelyphonus, description of a new 

 species of, by H. C. Wood, Jr., 312. 



Tringeaa, monograph on, by Elliott 

 Coues, 170. 



Tryon, George W., Jr., on the Mollusca 

 of Harper's Ferry, 390, 396 ; synop- 

 sis of the recent species of Gastro- 

 chjenidre, a family of Acephalous 

 Mollusca, 391, 465. 



Uhler, P. R., rectification of the paper 

 upon Hemiptera of the N. Pacific 

 Exploring Expedition, 258, 286 ; 

 Homoptera of the same, 258, 2S2 ; 

 descriptions of four new species of 

 Hemiptera, 258, 284. 



Unio, descriptions of eleven new species 

 of, by I. Lea, 391. 



Unionidre, descriptions of twenty-five 

 new species of, from Georgia, &c, 

 38 ; remarks on habits and growth 

 of, by Dr. Lewis, 57 ; descriptions of 

 twelve new species of, from Ala- 

 bama, 59. 



Uranoscopoids, synopsis of, by T. Gill, 

 108 ; monograph of the Tridigitate. 

 263. 



Warren, David M., announcement of 

 death of, 58. 



Wood, H. C, Jr., descriptions of new 

 species of Scolopendra, 2, 10 ; on the 

 American Chilopoda, with catalogue 

 of specimens in the Smithsonian 

 Institution, 311 ; description of a 

 new species of Thelvphonus. 311, 

 312. 



