PLATE XXVII. 



Ichthyosaurus. 

 Fig. 



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



2. Hypapophysis or ' wedge-bone ' of the atlas vertebra, upper view (Ic/i. longifrons) . 



3. Axis vertebra, upper view (ib.). 



4. Ib., front view (ib.). 



5. Ib., back view (ib.). 



(All the figures are of the natural size.) 



