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C^V 



CONTENTS. VU 



Part 4.— April 2d, 1868. 



Page. 



1. Record of Meetings, ....... 253 



2. Description of New Genera and Species of Miocene 



Shells, with Notes on other Fossil and Recent Spe- 

 cies, by T. A. Conrad, 257 



3. Description of Sixty-five New Species of Marine Gas- 



teropodae, inhabiting Polynesia, by W. Harper Pease, 271 



4. Monograph of the Terrestrial Mollusca of the United 



States, by George W. Tiyon, Jr., . . . .298 



5. Notices and Reviews of New Works, .... 325 



I. American. — Index to Vols. I to XI of Lea's Observations 



on the Genus Unio. The American Naturalist, No. 7. 

 Proceedings of the California Academy of Natural Sci- 

 ences, III. 



II. Foreign. 



British. — Conchologia Iconica, Parts 264, 265, Blanford's 

 Contributions to Indian Malacology, No. 8. Annals and 

 Magazine of Natural History, Nos. 115 and 116. Proceed- 

 ings of the Zoological Society of London, 1866, Parts II 

 and III. 



French. — Memoires de I'Academie Imperiale des Sciences 

 de St. Petersbourg, 7th Series, XI, No. 3, 1867. Journal ] 

 de Conchyliologie, 3d Series, VII, No. 4. Mollusques 

 Nouveaux, Litigieux ou Peu Connus. Parts 6 and 7, Jan- 

 uary and February, 1866. Revue et Ma^asin de Zoologie, 

 Vol. XIX, 2d Ser., No. 10, August, 1867. Actes de la 

 Societe Linnienne de Bordeaux, XXVI. Part i, 1867. 



German. — Archiv fur Naturgeschichte, 5th part, 1866, part 

 1,1867. 



6. Errata to Mr. Conrad's paper, ..... 334 



APPENDIX. 



7. Recorder's Report, by S. R. Roberts. 



8. Secretary's Report, by Rev. E. R. Beadle. 



9. Conservator's Report, by Jos. Leidy, M.D. 



10. Librarian's Report, by Chas. F. Parker. 



11. Publication Committee's Report. 



ILLUSTRATIONS. 



Two Colored and Six Uncolored Plates. 



17 

 20 

 23 

 26 

 39 



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