PLATE XXVII. 
Ichthyosaurus. 
Fig. 
1. Skull (lacking end of snout), upper view [Icli, latifrons). 
2. Plypapophysis or ^ wedge-bone ’ of the atlas vertebra, upper view {Ich. longifrom). 
3. Axis vertebra, upper view (ib.). 
4. Ib., front view (ib.). 
5. Ib., back view (ib.). 
(All the figures are of tlie natural size.) 
