CONTENTS. 



PxVET II. 



SYNOPSIS OE THE GENEEA. 



CHAPTER I. 



PAGE 



Class I. Cephalopoda. Order I. Dibranghlata 155 



Section A. Ogtopoda 158 



Earn, I. ArffGucwtidcB. — Argonauta 161 



Earn. II. Odopodidce. — Octopus, Pinnoctopus, Eledone, Cir- 



roteuthis, Philonexis, Scaeurgus, Eolita3na 163 



Section B. Degapoda 166 



Earn. III. Teuthidce. — Loligo, Gonatus, Sepioteuthis, 

 Beloteuthis, Geoteutliis, Leptoteutliis, Cranchia, Sepiola, 

 Loligopsis, Clieiroteutliis, Histioteuthis, Onychoteuthis, 

 Enoplotentliis, Ommastreplies, Thysanoteutliis, Loliolus, 

 Plesioteuthis, Dosidicus 167 



Earn. IV. Belcmnitidcc. — Belemrdtes, Belemnitella, Xipho- 

 teuthis, Acantlioteuthis, Belemnoteutliis, Conoteutliis .... 173 



Earn. Y. Scjnadm. — Sepia, Spiruliroetra, Beloptera, Belcm- 

 nosis, Helicerus 176 



Earn. VI. S2nruUdce.—^])\xvla. 175 



Order II. Tetrabr.vnghiata 178 



Earn. I. Kautilidcc. — Nautilus, Lituites, Troclioceras, Cly- 

 menia / 185 



Earn. II. Orthoccratidcc. — Orthoceras, GoHipJioceras, Onco- 

 ccras, Phragnioceras, Cyrtoceras, Gyroceras, Thoracoceras, 

 Xothoceras 190 



Earn. III. Ammonitida. — Goniatites, Pthabdoceras, Bactrites, 

 Ccratites, Ammonites, Crioceras, Toxoceras, Ancyloceras, 

 Scaphites, Helicoceras, Turrilites, Ilamites, Ptyclioceras, 

 Baculites 105 



CHAPTER II. 



Class II. Gasteropoda 202 



Order I. Prosobranchiata 209 



Section A. Siphonostomata 209 



Earn. I. Stromhid(C. — Stronabus, Pteroceras, Rostellaria, 

 Seraphs * ^ 210 



