CON" T K NT T S 



PAGE. 



I. Further Observations on Mr. Gabb's Palaeontology of Califor- 



nia, by T. A. Conrad 97 



'2. Observations on Reeeut and Fossil Shells, with proposed 



new Genera and Species, by T. A. Conrad 101 



'■' . Descriptions of new Species of Tertiary, Cretaceous and Re- 

 cent Shells, by T. A. Conrad 104 



4. Description of a new Species of Unio, by T. A. Conrad 107 



n. Description of a new Species of Vivipara, by Geo. W. Tryon, Jr. 108 

 (). Descriptions of new Fluviatile Mollusca, by Geo. W. Tryon, Jr. Ill 



7. Observations on an Abnormal Specimen of Physa gyrina, by 



George W- Tryon, Jr 114 



8. Monograph of the family Strepomatidse, rconcluded,; by George 



W. Tryon, Jr ' .v^ ; 115 



!). Note on the Lingual Dentition of the Strepomatidse, by George 



"W. Tryon 134 



10. Remarks on the Origin and Distribution of the Opercu- 

 lated Land Shells which inhabit the Continent of North 

 America and the West Indies, (continued, ) by Thomas Bland. 136 



II. Descriptions of new American Fresh- water Shells, by John G. 



Anthony....; 144 



EDITOR'S TABLE. 



Reviews and Summary of Conchological Publications 148 



American. — Review of the Northern Buccininns, by Dr. Win. Stimpson. — Re- 

 print of Conchological Papers, by Isaac Lea. —List of Brachiopoda from the 

 Island of Anticosti, by N. S. Shaler.— Stiuipson's Researches upon the 

 llydrobiime. — Proceedings of the Academy of Natural Sciences of Philadel 

 ])hia.— Morse's new Species of Pupadse.— Notes on Terrestrial Mollusca, 

 with Descriptions of new Species, by Thomas Bland. — Reperterio fisico- 

 natural de la Isla de Cuba. 



Foreign.. — Conchologia Iconica. — Further Reports on Shetland Dredgiugs, by 

 J. Gwyn Jeffreys. — Transactions of the liinniean Society. — British Con- 

 chology, Vol. 3, by Jeffreys. 



Malacologie d'Aix les Bains, Monographic du genre Paladilhia, et Moitessieria, 

 Mollusques de la Sahara, by J. R. Bourguignat. — Journal de Conchyliologie. 

 — Revue et Magazin de Zoologie. — Malacologie de la Grande-Chartreuse, 

 by Bourguignat. — Malacologie de I'Algerie, by Bourguignat. — Bulletin de 

 r'Academie Imp. des Sciences de St. Petersburg.— Annales des Sciences 

 Naturelles. 



Monographia Pneumonopomorum Viventium.—Ueber die Pamilie der Rissoiden, 

 by Mohrenstern.— NovitatesConchologicie, by Pfeiffer, Dunkerand Romer. 

 — Archiv. fur Naturgeschichte. 



Ofversigt af Kongl. Vetenskaps Akademiens Forhaadlingar, &c. 



Scientific Intelligence 179 



On the Anatomy of Tridacna elongata, by Leon Vaillant. — On the correct 

 Application of Certain Terms used in the Description of Shells, by A. A. 

 Gould, M.D.— Curious Distortion in the Shell of Physa heterostropha.— 

 Remarks on the Habits of Spirialis Flemingii, by Alex. Agassiz.— Collection 

 of Shells for Sale.— Report of the Conchological Committee of the Academy 

 of Natural Sciences.— Address of the Building-lund Committee of the Acad- 

 emy of Natural Sciences, etc. 



Obituary 189 



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



1^ — =^^ 



