MEMOIRS NATIONAL ACADEMY OF SCIENCES. VOLUME VIII. 



PLATE !.• 



.V hy 



ni}^:-:- 



Fig. 6. 



* •#'. IIICS 





•to ( *• ' 1 _ •\ I #; ;•• 





Fig. 2. 



cp 



Fig. 3. 



Fig. 4. 





pe 





^0^55^%,, he 



'0f M ' 



^-^ VjlrV ce 



e Fig. 11. 



Klg. 



Fig. 8. 



Fig. », 



hip 3-4 



hip 4-5 



hip 4-5 



Fig. 12. 



..•fl*st:iiiV...> 



hip 2-3 



Pig. IS. 



CASWELL GRAVE DEL. 



