VI. 



INDEX. 



Lenibus, description of the genus, by 



T. Gill, 16. 

 Lepidoptera, on some species of, found 



in the United States, &c, by Wm. 



H. Edwards, 160. 

 Lignite, discovery of, on Plymouth 



Creek, 77. 

 Linmobiaceae, descriptions of nine new, 



by Baron R. Osten Sacken, 287. 

 Liostomiufe, communication on, bv T. 



Gill, 89. 

 Lithasia, description of new species of, 



by I. Lea, 54. 

 Lutjanus, identity of, with Neoinaenis, 



by T. Gill, 93. 

 Lyon, Sidney S., description of new 



Palaeozoic Fossils from Kentucky and 



Indiana, 390, 409. 



Mammal, Description of a new Quad- 

 rumanous, by J. A. Slack, M. D.,463. 



Markland, Mr. John H., Announce- 

 ment of the death of, by Mr. Ser- 

 geant, 1. 



Meek, F. B. , descriptions of new Palaeo- 

 zoic fossils from Illinois and Iowa, 

 124, 128 ; descriptions of new Cre- 

 taceous fossils from Vancouver and 

 Sucia Islands, 311, 314; description 

 of the lower Silurian, Jurassic, Cre- 

 taceous and Tertiary fossils collected 

 in Nebraska, &c, 390, 415. 



Melania, descriptions of forty- nine new 

 species of, by I. Lea, 117. 



Melanidae, description of a new genus 



Neritina, description of a new species 



of, by I. Lea, 55. 

 Norris, Thaddeus, remarks on a species 



of Osmerus, 56, 58. 

 Notothenoids, synopsis of, by T. Gill, 



512. 



Oak, Bartram, note on, by S. B. Back- 

 ley, 361. 

 Ophiologv, contributions to, by E. D. 



Cope, 292. 

 Ornithology of Labrador, by E. Coues, 



215. 

 Osmerus, remarks on, by T. Norris, 58. 

 Osten Sacken, Baron, on the sex of 



Cynipidae, 150. 

 Osten Sacken, Baron R., nine new 



species of N. American Limnobiadae, 



258, 287. 

 Otolicnus apicalis, Remarks by Dr. 



Slack on a species so called by Du 



Chaillu, 153. 



Panolopus, on the genera Panolopus, 



of, by I. Lea, 96. 



Miles, Manly, descriptions of two new 

 species of shells from Michigan, 124. 



Midas, description of a new species of, 

 by J. H. Slack, M. D., 463. 



Mollusca, descriptions of new fossil, by 

 I. Lea, 148 ; list of those inhabiting 

 the neighborhood of Philadelphia, 

 306 ; catalogue of, from British Ame- 

 rica, by W. G. Binney, 330 ; notes 

 on the Molluscs of California, by the 

 same, 331 ; on the Mollusca of Har- 

 per's Ferry, Virginia, by G. W. Try- 

 on, Jr., 396 ; synopsis of recent 

 species of Gastrockaenidse, a family 

 of Molluscs, by the same, 465. 



Moore, Dr. Samuel, announcement of 

 the death of, 56. 



Mosasaurus, remarks on bones of, 

 found in upper stratum of Marl, by 

 Dr. Slack, 2. 



Neomsenis, identity of, with Lutjanus, 

 by T. Gill, 93. 



&c, by E. D. Cope, 494. 



Percinae, synopsis of, by T. Gill, 44. 



Peters, Francis, announcement of death 

 of, 125. 



Philypni, appendix to Monograph on, 

 by T. Gill, 16. 



Pitta, description of new a species of, 

 by D. G. Elliot, 153. 



Plants, descriptions of new, from Texas, 

 by S. B. Buckley, 448. 



Pleistocene, deposit of, on the shore of 

 James' Bay, 97. 



Podothecus, on the genus, by T. Gill, 

 258. 



Polvnematoids, synopsis of, byT. Gill, 

 271. 



Prime, Temple, Synonymy of the Cy- 

 clades, &c, No. 2, 21, 25 ; Descrip- 

 tions of new species of Cyrena, &c, 

 124, 125 ; Descriptions of three new 

 species of Mollusca, 391, 414 ; Mono- 

 graph of the species of Sphaerium of 

 North and South America, 391, 402. 



Ravenel, Edmund, description of new 

 recent shells from the coast of S. 

 Carolina, 21, 41. 



Rattlesnakes, on three new forms of, 

 by R. Kennicott, 206. 



Reptilia of Sombrero and Bermuda, by 



i E. D. Cope, 312. 



Rhyptici, synopsis of, by T. Gill, 52. 



Ripley Group, announcement of the 



discovery of an 

 Gloucester, by Mr 



outcrop of, 

 , Gabb, 124. 



near 



