PLATE 11. 



Laceetian s . — Echinodon Becelesii. 



Fig. 



1. Fore part of upper jaw and teeth; a, nat. size ; b, tooth, magnified. 



2. Hind part of upper jaw and teeth ; a, nat. size; b, tooth, magnified. 



3. Part of upper jaw and teeth, outer side; a, nat. size; b, teeth, magnified. 



4. lb,, inner side; a, nat. size. 



5. Part of lower jaw ; a, nat. size; a, b, c, anterior teeth, magnified. 



6. Part of lower jaw, outer side ; a, nat. size. 



7. lb., dentigerous border ; a, b, crown of a rising tooth, magnified. 



8. lb., inner side. 



9. Fore part of lower jaw ; a, tooth ; both figures magnified. 



From the Purbeck Oolite, Dorsetshire. 





