IV 



INDEX TO VOL. IV. 



ENALIOSAURIA. 



Order— ICHTHYOPTERYGIA 



Genus — Ichthyosaurus 



Species — Ichthyosaurus campylodon . 



(The fossils which would have formed the subjects of Plates 5 and 6 



Species — Ichthyosaurus campylodon , 



Sub-order— SA UROPTERYGIA. 



Genus — Plesiosaurus 



Species — Plesiosanrus dolichodeirus . 



hotnalospondylus 



(skull) . 



(vertebrre) 



(skeleton) 



rostratus 



(vertebrae) 



— — (skull) 

 rugosus 



— — (vertebrae) 



— Ilawkinsii (skull) 



— macrocephalus . 



— brachycephalus 

 Bernardi 



— Smithii 



— pachyomus 



Smithii (paddle-bones) 

 Polyptychodon interruptus 



Order— ICHTHYOPTERYG1 A 

 Genus — Ichthyosaurus . 



— (skull) 



— (skull and vertebrae) 



Species — Ichthyosaurus communis 



— breviceps 



— inlermedius . 



failed to reach me.) 



En ah 



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