"m 



CONTENTS 



l'\OF.. 



1. Record of Meetings'.'. 117 



2.. On the Pterocerae of Lamarck, and their Mutual Relations. 

 ■ ■ • By Theodore Gill, M.D 120 



3. Mateiials for a Monograph of the Faxiily Lepetidce. By 



Wm.H. Dall HO 



4. On the Land and Fresh-Water Mollusca of Nicaragua. By 



Ralph Tate 151 



5. Descriptions of Ne'w Species of Marine Mollusca. By Wes- 



ley- Newconib, M. D 1615 



6. Description of a New Ameiican Helix. By Wesley XewcoraV), 



M.D 1G5 



7. Catalogue of the Shells of the Coosa River, Alabama. By 



James Lewis, M. D ICfJ 



8. Descriptions of New Species of Marine Bivalve Mollusca 



in the Collection of the Academy of Natural Sciences. 



By George W. Tryon, Jr 170 



0. Notices and Reviews of New Conchological Works. By 



George W. Tryon, Jr 173 



I. American. — Binney's Pulmonata of North America. 



II. Foreign. — Brithh. — Report.=i of the British Assoc, for the Advancement of Science. 

 Annals and Magazine of Natural History. Jeffreys' British Conchology. Wood- 

 ward's Manual of the Mollusca. Concliologia Iconiea. 



French.— Cai. des Mollusques des Mers d'Europe, par Petit de la Saussaye. Faune 

 Malacologique de Belgique, par F. de Malzine. Journal de Conchyliologie. 



German. — Blalaiiozoologische Blatter. Pfeitl'er's Monographia Heliceorum Viven- 

 tium. Novitates Coneliologicte. 



APPENDIX. 

 10. Catalogue of the Families Porcellanidae and Amphiperasidae. 



By S. R. llobcrts 180 



NOTICE TO CONTRIBUTORS. 



Authors sending specimens with their papers, can have colored illustra- 

 tions furnished without rxjense to them. 



Tirenly copies of every contribution (without re-paging or illustration) is at 

 the service of its author, if applied for in season. 



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



2.i copies. . 50 copies. 100 copies. 250 cnpii s 



16 pages, $4 00 $5 00 $6 75 $10 00 



8 pages, 3 00 3 75 5 25 7 50^ 



2 to 4 pages, 2 50 3 12 4 25 C 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 



Conchological Section, Acddemij oj^ Natural Sciences, Philadelphia. 



