Mortar, iv, 373. ----, _W. H. Wright_, on, xlix, 379. _Morton, J._, ancient mound near Wheeling, Va., vi, 166. _Morton, S. G._, new work on American crania, proposed, xxxii, 207. ----, ibid, review of, xxxviii, 341.^f ----, characteristics of the Aboriginal race of America, xlvii, 408. ----, Crania Ægyptiaca, notice of, xlvii, 205. ----, on a second series of ancient Egyptian crania, xlviii, 268. ----, on the internal capacity of the cranium in different races of men, xxxviii, 373. ----, on the fossils and geological characters of the ferruginous sand formation of the United States, xvii, 274, 290; xviii, 243, 249^f; xxiii, 288^f; xxiv, 128.^f ----, analogy between the marl of New Jersey and the chalk of Europe, xxii, 90. ----, synopsis of the organic remains of the cretaceous group of the United States, xxvii, 377. ----, proposed division of the U. States cretaceous group, xxviii, 277. ----, discovery of the galt in Alabama, xxviii, 277. ----, head of a fossil crocodile, xlviii, 265.^f ----, list of fossils associated with the fossil crocodile, xlviii, 267. ----, on the fossil teeth of fishes in the United States, xxviii, 276. ----, notice of an embalmed Ibis, from Egypt, xli, 187. ----, supposed new species of hippopotamus, xlvii, 406.^f ----, memoir of Wm. Maclure, xlvii, 1.^f Mosaic cosmogony, xxv, 26. ---- ----, critical interpretation of _bara_ and _asah_, _N. Webster_, xxxv, 375. ---- gold, xiii, 174. Mosasaurus, xvii, 289; xviii, 246. ----, in United States, xxvii, 353. Möser, images of, _Karsten_ on, xlv, 228. Moss, Irish, or carrageen, _L. Feuchtwanger_, xxvi, 389. Mosses and ferns of the United States, _L. C. Beck_, xv, 287. Motion, the natural state of matter, xvi, 151. ----, on the principles of, and their use in the higher mathematics, xiv, 297. ----, revolving, in fluids, xix, 391. ---- of living particles in all kinds of matter, xix, 393. ---- of a system of bodies, _T. Strong_, xxiv, 40; xxv, 281; xxvi, 44. ---- ibid, _Lagrange's_ formulæ, xi, 398. Moulting of birds, xxiv, 366. _Moultrie, J._, skull of fossil human skeleton of Guadaloupe, xxxii, 361.