VI CONTENTS. 



distribution of the Cephalopoda in time — General characters 

 of the Tetrabranchiata — Anatomy of the Pearly Nautilus — 

 Sliell of the Tetrabranchiata — Distribution of the Tetrabranch- 

 iata in time — Nautilidae — Orthoceratidfe — Animonitidre — Shell 

 of the Animonitidse — Distribution in time of the Amnionitidce 

 — Genera of the Ammonitidoe, ...... 53-86 . 



CHAPTER XXVIII. 



General characters of the Dibranchiate Ce]ihalopods — Distribution 

 of the Dibranchiata — Octopoda — Argonautidse — Octopodidse — 

 Decapoda — Teutliidse — Sepiadre — Spirulidce — Belemnitidaj — 

 Literature of Mollusca, 87-99 



CHAPTER XXIX. 



General characters of the Vertebrata — General structure of the 

 Vertebrate skeleton — Classes of the Vertebrata — General dis- 

 tribution of Vertebrata in time, 100-108 



CHAPTER XXX. 



General characters of the Fishes^Scales of Fishes — Skeleton of 

 Fishes — Limbs of Fishes— Median fins of Fishes — General dis- 

 tribution of Fishes in time — Conodonts, .... 109-123 



CHAPTER XXXL 



Teleostean and Ganoid Fishes — General characters of the Teleostei 

 — Sub-orders of the Teleostei — Malacopteri — Anacanthini — 

 Acanthopteri — Plectognathi — Lophobranchii — General charac- 

 ters of the Ganoidei — General distribution of the Ganoids in 

 time — Classification of the Ganoids — Amiadoe — Lepidosteida; — 

 Platysoinidse — Crossopterygidte — Families and distribution of 

 the CrossojiterA-gious Ganoids — Acanthodidte — Ostracostei — 

 Chondrosteidpc, ......... 124-1.51 



CHAPTER XXXII. 



Elasmobranchii and Dipnoi — General characters of the Elasmo- 

 branchii — General distribution of the Elasmobranchii in time 

 — Holocephali — Plagiostomi, general characters and divisions of 

 Cestraphori— Cestracionts of the Upper Ludlow Rocks — Hybo- 

 donts and Acrodonts — Selachii — Batides — General characters of 

 the Dipnoi — Characters of Ceratodus — Dipterus — Palseichthyes 

 of Dr Giinther— Literature of Fishes, .... l.")2-172 



