TAB. XXII. 



Ichthyosaurus. 



Fig. 



1. Skull (lacking the lower jaw), back view {Ich. longifrons). 



2. Vertical transverse section of hind end of mandibular ramus {Ich. intermedin). 



3. lb., somewhat in advance of fig. 2 (ib.). 



4. Ib., across the hinder end of the dentary element (ib.). 



5. Ib., in advance of the mid-leogth of mandibular ramus (ib.). 



6. Ib., across the anterior end of the surangular and splenial elements (ib.). 



7. Ib., near the anterior end of both mandibular rami (ib.). 



8. Terminal caudal vertebrae with accidentally deflected pinnigerous end (ib.). 



(All the figures save the last are of the natural size.) 



