COISTTEIS^TS 



PAOE. 



1. List of OfBcers and Committees 1 



2. Record of Mestlngs 2 



H. Observations on Pleicdon Macmurtrli, by T. A. Conrad 4 



4. Paleeoutological Miscellanies, by T. A. Conrad 5 



Note on a Cretaceous Limestone of Dakota. Note on Aluria Mathfwsnni—oa 

 Corln'ciili ilr)i.iit!a, (Jonrad. Description of a new genus of PectinidiB. 



5. Descriptions of New Genera and Species of Fossil Sheila, 



by T. A. oiirail 8 



G. On the Errors of too Exclusive Classifications, by II. Crosse. 



Tr.msliitfd l)y Frai.k Daulti' 17 



7. Observations on the Batbymetrical and Geographical Distri- 



bution of Marine Invertebrate Animals, by J. Gwyu Jertreys.. 26 



8. Description of a new Species of Montacuta, by John II. 



Thoni?oii 33 



9. Monograph of the Terrestrial MoUusca of the United States, 



l)y UciU'i^e W. Tryiin, Jr. (Continued) 34 



10. Illustrations of new Species of Partula, by Wm Harper Pease, 81 



11. Notices and Reviews of New Works, by George \V. Tryon, Jr., 82 

 >l(ni!;i™«.— Memoirs of the Boston Society of Natural History. Proceedings 



of the (Jalif )rniii .Aeudemy of Natural Sciences. Journal and Proceeding." 



of the Philadelphia .Academy of Natural Sciences. Primes' Monograph of 



A inerii;an Corhieuladie. 

 Jiriti.i/i.~.\nuii\s and Magazine of Natural History. Transactions of the Linnean 



Society. P. oceeding.-* of the Zoological Society. Lord's Naturalist in 



Britisli Columbia. Conehologia Iconica. 

 /'rf/fc/i.— Journal de Coiichyliologie. Stabde's MoUusques du Piemont. Revue 



et Magazin de Zoologie. 

 r;<rm((/i.— Fauna der Kieler Bucht. MaUkozoologische Blotter. Monatsber- 



ichte der Kcinig. Preuss. A^ad der Wissenschaften zu Berlin. Verh.Zool- 



botanischen Gesellschaft in Wein. Novitates Conchologicse. 

 7/a?(((».— Stossich'.s Mollusc^hi del Golfo di Trieste. Molluschi raccolti dalla 



Mis.iioue Italiana in Persia, by Issel. 



12. Scientific Intelligence 104 



On reverserl Helices. On /'utwlim sculiriii. Say; on the genus Papoidea, Pease, 

 a.nd I'ul limi, emper; Polymorphism among Bryozoa; I^oie on Hdixjiddis, 

 (iray; on I'alvjta JeU,.ii, Crosse. 



13 Obituary 106 



Augustus A. Gould, M.D., Major Robert Kennicutt. 



NOTICE TO CONTRIBUTORS. 



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Twehti copies of every contribution (without re paging or illustration) is 

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Extra copies, re-piged, can be had on the following terms : 



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8 pages, 3.00 3 75 5.25 7.50 



2 to 4 pages, 2.50 3 12 4.2.5 6.25 



Uncolored plates at 3 cents each, or colored plates 12 to 18 cents each. 



Contributions, as well as Papers and Works for Review or Exchange, 



should be directed to 



CoNCHOt-oGiCAL Sectiov, Academv OP NatL'ral Scibxcks, Philadelphia. 



