CONTENTS. V. 



Obituary 180 



Lovell Reeve. — M. Valenciennes. — Bouchard-Chantereaux. 



ILLUSTRATIONS. 

 Portrait of John G. Anthony, with Autograph. 

 Three Colored and Four Plain Plates. 



Part 3— July 1st, 1866. 



1. Descriptions of New Species of Partula, Inhabiting the 



Tahitian Archipelago. By W. Harper Pease 193 



2. Remarks on Nudibranchiata inhabiting the Pacific Isl- 



ands, with Descriptions of two New Genera. By W. 

 Harper Pease 204 



3. Descriptions of Achatinellse. By Wesley Newcomb, M. D... 209 



4. Monograph of the Terrestrial Mollusca of the United 



States. By George W. Tryon, Jr 218 



1. Preface. 



2. Introduction. 



3. Descriptions of Species. 



4. Reference to Plates and Synonymy. 



5. Descriptions of American Fresh-water Shells. By T. A. 



Conrad 278 



6. Descriptions of New Marine Bivalve Shells. By T. A. 



Conrad 280 



EDITOR'S TABLE. 



Reviews 283 



American. — Proceedings of the Essex Institute.— Transactions of the 

 Academy of Science of St. Louis.— Annals of the New York Ly- 

 ceum of Natural History. — Brown's Catalogue of Shells. — Note 

 on the affinities of Bellerophontidre, by F. B. Meek. 



Foreign. — Tate's Land and Fresh-water Mollusks of Great Britain. — 

 Conchologia Iconica, etc. 



Obituary 288 



Cantraine — Poulson. 



ILLUSTRATIONS. 



Portrait of Prof. S. S. Haldeman, with Autograph. 

 Three Colored and Four Plain Plates. 



