404 



Gutta percha, 276 ; cohesive properties 

 of, 268 ; discussion on, 269. 



Hail, impressions of, 290. 

 Hammer-headed Shark, foetal specimen 



of, 157. 

 Harris, Thaddeus W., death of, 312; 



resolutions on, 324. 

 Hawk, red-shouldered, (Buteo Unenius,) 



esgs of, obtained in Milton, Mass., 



208. 

 Heart of Menobranchus, 51. 

 Helix ceruginosa, Gould, 127. 



infumata, " ] 27. 



Herpetology, Curator of, J. N. Borland 



elected, 125 ; report of curator of, for 



1855, 206. 

 Horses poisoned by parasitic growths 



on grain, 383. 

 House-fly, parasite on, 90. 

 Howling" Monkey, vocal apparatus of 



and new muscle in, 90. 

 Hybernating insects, 157. 

 Hybrid between Clangula Americana 



and Mergus cucullatus, 57, 118. 

 Hybrids, degeneration of, 222 ; sterility 



of, 220. 

 Hybridity a test of specific difference, 



221. 

 Hydras Amei'ican, new species of, 103. 

 Hydra tejiuis, Ayres, 104. 



Ichthyosaurus platyodon, casts of ex- 

 hibited, 271. 



Impressions, fossil, on Connecticut 

 Kiver Sandstone, 209, 277 ; of hail. 

 290; quadrupedal, new specimens of, 

 305; of rain drops, 253, 258. 



Indian crania, account of, 76. 



Insects, hybernating, remarks on bv 

 Prof. J. Wyman, 157. 



Insects, their tracks in sandstone, 105. 



Invertebrata, marine, of South Caro- 

 lina, new species, 110. 



Iron, American, 250; Nova Scotia, J. 

 L. Hayes on, 250 ; steely, Manganese 

 in, 250; native, from Liberia, 230, 

 250 ; from Africa, 338 ; from Mexico, 

 62; ore from Nova Scotia containing 

 fossils, 242; protocarbonate of, Prol^ 

 AV. B. Rogers's theory of its presence 

 in coal measures, 283. 



Iron Mines, Acadian, 245 ; Victoria, 

 247 ; Nictau, 249 ; of Cornwall, Pa., 

 Prof. H. D. Rogers on, 42. 



Japan, anthracite from, 207; dog from, 

 355. 



Labrus^jM?c/(er, Ayres, 101. 

 Labyrinthodon, 298 ; a new figure of, 



299. 

 Lake Superior, fossils of, 85. 



Lama, structure of stomach of, 24. 

 Laterite brick, 226; Laterite formation 



of Burmah, 227. 

 Lava, Hawaiian, 356. 

 Lepton lonr/ipes, Stimpson, 111, 



Letters received from 



Academy of Natural Sciences of 



Philadelphia, 93. 

 Academy, Western, of Natural Sci- 



ences,'233, 384. 

 Academic Imperiale de Bordeaux, 



265. 

 Academic Royale de Stockholm, 265. 

 Accademia delle Scienze dell' Istituto 



di Bologna, 187. 

 Akademie, K. Bayerisch,. 63, 125, 



146, 282, 395. 

 Akademie, K. der Wissenschaften, 



Berlin, 256, 323. 

 Akademie, K. der Wissenschaften, 



Wien, 63, 124, 125, 233, 265, 323, 



395. 

 Alger, Francis, 361. 

 American Philosophical Society, 63, 



124, 323. 

 Athenaeum, Boston, 323. 

 Ayres, William 0. 75, 94. 

 Barry, Rev. A. C. 93. 

 Baird, Spencer F. 56, 384. 

 Binney, C. J. F. 167. 

 Brown, George C. 323. 

 California Academy of Natural Sci- 

 ences, 93, 233. 

 Cambridge Philosophical Society, 



145. 

 Commissioner of Indian Affairs, 323. 

 Crouch, Mr. 167. 

 Daniels, Edward, 346. 

 "Deane, James, 390. 

 De Beaumont, M. Elie, 204. 

 Essex Institution, 63. 

 Field, Roswell, 126, 155, 160. 

 Frauenfeld, G. 395. 

 Girard, Charles, 93. 

 Greenleaf, Rev. P. H. 180. 

 Gundlach, Dr. John, 205. 

 Hanley, Sylvanus, 118. 

 Harvard College, 63. 

 Howell, Robert, 384. 

 Jones, John C. 258. 

 Journal, American, of Science and 



Arts, editors of, 20. 

 Kaup, Dr. 39. 

 Kennicott, R. 390. 

 Kong. Danske Videnskabernes Sels- 



kab, 282. 

 Kneeland, Samuel, Jr. 206. 

 Kumlien, Tliure, 93. 

 Latour, L. A, H. 93. 

 Lea, Isaac, 276, 311. 

 Lewis, James, 25, 120, 295. 

 Library, New York State, 233. 



