CONTENTS. 



PAET II. 



SYNOPSIS OF THE GENEEA. 



CHAPTER I. 



PAGE 



Class I. Cephalopoda. Okder i. Dibranghiata loo 



Section A, Octopoda 158 



Fam, I. Argonautid(B. — Argonauta 161 



Fam. II. Octopodidce. — Octopus, Pinnoctopus, Eledone, Cir- 

 roteuthis, Philonexis, Scaeurgus, Bolitsena 163 



Section B. Decapoda 166 



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

 Beloteuthis, Geoteuthis, Leptoteuthis, Cranchia, Sepiola, 

 Loligopsis, Cheiroteuthis, Histioteuthis, Onychoteuthis, 

 Enoploteutliis, Ommastrephes, Thysanoteuthis, Loliolus, 

 Plesioteuthis, Dosidicus 1G7 



Fam. IV. Belemnitidce. — Belemnites, Belemnitella, Xipho- 

 teuthis, Acanthoteutliis, Belemnoteiithis, Conoteuthis .... 173 



Fam. V. SepiadcB. — Sepia, Spirulirostra, Beloptera, Belem- 

 nosis, Helicerus 176 



Fam. VI. Spirulidce. — Spii'ula 179 



Order II. Tetrabranghiata 178 



Fam. I. Nautilid<R. — Nautilus, Lituites, Trochoceras, Cly- 

 menia 185 



Fam. II. Orthoceratid(B. — Orthoceras, Gomphoceras, Onco- 

 ccras, Phragmoceras, Cyrtoceras, Gyroceras, Thoracoceras, 

 Nothoceras 190 



Fam. III. Ammonitidce. — Goniatites, Rhabdoceras, Bactrites, 

 Ccratites, Ammonites, Crioceras, Toxoceras, Ancyloceras, 

 Scapkites, Helicoceras, Turrilites, Hamites, Ptychoceras, 

 Baculites 195 



CHAPTER II. 



Class II. Gasteropoda 202 



Order I. Prosobranchiata 209 



BSCTION A. SiPHONOSTOMATA 209 



Fam. I. Stromhidcc. — Strombus, Pteroceras, Rostellaria, 

 Seraphs 210 



