VI. 



INDEX. 



Kittoe, Dr. E, D., don. to mus., iii. I 



Lea, Isaac, LL. D., Vice President, re- 

 marks on the visual organs of certain 

 species of the Genus Unio, 17 ; de- 

 scription of thirteen new species of 

 Uniones from Georgia, 18 ; descrip- 

 tion of twelve new species of Naiades, 

 13 ; description of six new species of 

 Unio from Alabama, 75 ; description 

 of eight new species of Naiades, from 

 various parts of the United States, 

 75 ; description of three new exotic 

 species of Naiades, 75 ; description of 

 six new species of fresh water and 

 land shells, 101 ; remarks on Unio 

 spinosus, 101 ; change of name of 

 Unio umbrosus and Unio Wheatleyi, 

 to U. umbrans and U. Catawbensis, 

 104; remarks on two specimens from 

 the dark slates of the Red sandstone 

 of Phoenixville, Pa., 149 ; descriptions 

 of twenty-seven new species of Uni- 

 ones from Georgia, 151 ; observa- 

 tions on the geology of the Red sand- 

 stone near Gwynnedd, 173 ; descrip- 

 tions of Exotic Genera and species of 

 the family Unionidas, 203 ; remarks 

 on plates of fresh water Naiades from 

 Siam, 205 ; remarks on Trilobites 

 found at Braintree, Mass., 205 ; don. 

 to mus., i. iv. 



Le Conte, Maj. John, description of 

 several new mammals from Western 

 Africa, 1 ; on three new species of 

 Vespertilionidffi, 173; observations 

 on the Wild Turkey, 173 ; don. to 

 mus., iii. 



Le Conte, Dr. J. L., catalogua of the 

 species of Bembidium found in the U. 

 States, 1 ; Index to theBuprestidae of 

 the U. States, described by Laporte 

 and Gory, with notes, 1 ; synopsis of 

 the species of Clivina and allied 

 genera inhabiting the U. States, 75 ; 

 don. to mus., ii. iv. vii. v. 



Leidy, Joseph, M. D., memorial to Con- 

 gress, 1 ; observations on Entozoa 

 found in the Naiades, 18 ; list of Ex- 

 tinct Vertebrata found in the region 

 of the Missouri, with remarks upon 

 their geological age ; 75 ; observa- 

 tions on coprolites and shales with 

 Posidoniae, 149 ; observations on new 

 Red Sandstone fossils from the Gwyn- 

 nedd Tunnel, North Penna. R. Road, 

 150 ; rectification of the references 

 of certain of the extinct Mammalian 

 genera of Nebraska, 175 ; remarks 

 on dentition of the Mososaurus, 176 ; 

 on Oceanthus, 177 ; resolutions on 



death of G. R. Gliddon, 203 ; remarks 

 on a large species of Gordius, 204; 

 remarks on larva of Oestrus or bot- 

 fly, 204 ; remarks on a curious Ani- 

 malcule on stones and dead plants in 

 the Schuylkill and Delaware rivers, 

 204 ; observations on the introduc- 

 tion of the Camel into North Ameri- 

 ca, 210 ; don. to lib., v. vi. ;* don. 

 to mus. ii. iii. iv. v. vi. viii. 



Lesley, J. P., remarks on specimen of 

 lead, 173. 



Laughlin, D. M., don. to mus., iv. 



Lambert, J., don. to mus., iii. 



Lehman, E., don. to mus., vi. 



Lesquereux, Leo., don. to mus., vL 



Luther, S. M., don. to mus., vi. 



Lapham, J. A., don. to lib., iv. 



Latour, L. A. Huguet, don. to lib. v. v.* 



Lowe, Rev. E. J., letter from, 17. 



Letters 1, 2, 3, 4, of correspondence. 



Meek, F. B., explorations under the 

 War Department : descriptions of 

 new cretaceous and tertiary fossils 

 collected by Dr. F. V. Hayden in Ne- 

 braska, &c., with some remarks on 

 the geology of the Upper Missouri, 

 by F. B. Meek and F. V. Hayden, 

 M. D., 104. 



Morris, J. C, M. D., remarks on fishes 

 kept in vases without change of 

 water, 150 ; remarks on fishes brought 

 from Panama, 178 ; don. to mus., i. 

 iv, 



Morton, Thos., M. D., don. to mus., i. 



Mactier, Wm. L., don. to mus., i. 



McClane, Wm., don. to mus. ii. 



Morris, G. C, don. to mus., ii. 



Mitchell, R. W., don. to mus., iii. vi. 



Miller, S. F., don. to mus., v. 



McKown, Capt. J. P., U. S. N., don. to 

 mus., vi. viii. 



McClellan, Dr. J. H. B., don. to mus. 

 vi. vii. 



Michener, Ezra, don. to mus., vii. 



Mitchell, S. Weir, M. D., don. to mus., 

 viii. 



McCartee, Dr. don. to mus., viii. ix. 



Minturn, Dr. Edward, don. to mus., viii. 



Marcou, Jules, don. to lib., i. 



Motschulsky, V. de, don. to lib., x. 



Maximilian, Prince de Wied, don. to 

 lib., vi.* ; don. to mus., iv. 



McEuen, Chas., death of, 204. 



Nott, J. C, don. to lib., vii. 



Ord, George, Prcst., don. to lib., v. 

 Osten Sacken, Baron R., exchange with 

 lib. vi. 



[1857. 



