TAB. XXIII. 



Fig. 

 1. 

 2. 



3. 



4. 



Ichthyosaurus. 



Skull (lacking end of snout), upper view (Ick. latifrons). 



Hypapophysis or ' wedge-bone ' of the atlas vertebra, upper view {Ich. longifrons). 

 Axis vertebra, upper view ( 10 )- 



lb., front view (ib.). 



5. Ib., back view 



(All the figures are of the natural size.) 



(ib.). 



