Part 2— April 1st, 1866. 



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



California. By T. A. Conrad 97 



2. Observations on Recent and Fossil Shells, with proposed 



new Genera and Species. By T. A. Conrad 101 



3. Descriptions of new Species of Tertiary, Cretaceous and 



Recent Shells. By T. A. Conrad 104 



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



5. Description of a new Species of Vivipara. By George W. 



Tryon, Jr 108 



6. Descriptions of new Fluviatile MoUusca. By George 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, (concluded.; By 



George W. Tryon, Jr 115 



9. Note on the Lingual Dentition of the Strepomatidse. By 



George W. Tryon, Jr 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 Buccinums, by Dr. Wm. Stimp- 

 son. — Reprint of Conchological Papers, by Isaac Lea. — List of 

 Brachiopoda from the Island of Anticosti. by"N. S. Shaler.— Stimp- 

 son's Researches upon the Hydrobiinre. — Proceedings of the Acad- 

 emy of Natural Sciences of Philadelphia. — Morse's new Species of 

 Pupadaj. — Notes on Terrestrial Mollusca, with Descriptions of new 

 Species, by Thomas Bland. — Reperterio fisico-natural de la Isla 

 de Cuba. 



Foreir/)i..- — Conchologia Iconica. — Further Reports on Shetland 

 Dredgings, by J Gwyn Jeffreys. — Transactions of the Linnsan 

 Society. — British Conchology, Vol. 8, by Jeffreys. 



Malacologie d'Aix les Bains, Monographie du genre Paladilhia, et Moit- 

 essieria, MolUisques de la Sahara, by J. R. Bourguignat.— Journal 

 de Conchyliologie. — Revue et Magazin de Zoologie. — Malacologie 

 de la Grande-Cliartreuse, by Bourguignat. — Malacologie de I'Al 

 gerie, by Bourguignat.— 13 ulletin de I'Academie Imp. des Sciences 

 de St Petersburg. — Annales des Sciences Naturelles. 



Monographia Pneumonopomorum Viventium.— Ueber die Familie der 

 Rissoiden, by Mohrenstern. — Novitates Conchologicse, Dy Pfeiffer, 

 Dunker and Romer.— Archiv. fur Naturgeschichte. 



Ofversigt af Kongl. Votenskaps Akademiens Forhandlingar, &c. 



Scientific Intelligence 179 



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

 correct Application of Certain Terms used in the Descrijition of 

 Shells, by A. A. Gould, M.D.— Curious Distortion in the Shell of 

 Physa heterostropha. — Remarks on the Habits of Spirialis Flem- 

 ingii, by Alex. Agassiz. — Collection of Shells for Sale. — Report of 

 the Conchologicai Committee of the Academy of Natural Sciences. 

 —Address of the Building-fund Committee of the Academy of Na- 

 tural Sciences, etc. 



