CONTENTS OF THE SECOND VOLUME. 



PART II.—PAL^EOZOOLOGY (Contmued). 

 CHAPTER XXIV. 



PAGE 



(ireneral characters of the Gasteropoda — Shell of the GasterojDods — 

 Siphonostomatous and Holostomatous Univalves — Table of the 

 divisions of the Gastero]3oda — General distribution of the Gas- 

 teropoda in time — Strombidse — Mnricidse — Buccinidpe — Conidse 

 Volutidae — Cyprseidse — Xaticidse — Pyramidellidse — Cerithiada3 

 — Melaniadee — Turritellidse — Littorinidte — Paludinidte — Nerit- 

 idse — Turbinidse — Haliotidee — Pissnrellidse — Calyptrseidfe — 

 Patellidae — Dentalidse — Chitonidse — Opisthobranchiate Gas- 

 teropods — Tornatellidse — Bullidse — Aplysiadte — Plenrobran- 

 chidse, .......... 1-37 



CHAPTER XXV. 



Heteropoda — Firolidte — Atlantidoe — Puhnonate Gasteropods — Heli- 

 cidse — Limacida3 — Linmaeidse — Auriculidpe — Cyclostomidas — 

 AciculidfB, 38-46 



CHAPTER XXVI. 



General characters of the Pteropoda— General distribution of the 

 Pteropoda in time — Hyalea — Theca — Conularia — Tenta- 

 culites, 47-52 



CHAPTER XXVII. 



General characters of the Cephalopoda — Mandibles of the Cephalo- 

 pods — Ink-sac, shell, and internal skeleton — Divisions — General 



