Vol. XVI. 



rhilos. Trans. 



J'l.U. 



1 



1.1. 



Shell A. la. 30 ir. 



n^.z 



Fi0.6. 



^.7. 



Shdi B. 



Fig.!. 



<S^ 



Fy.Z. 



51 Fi^.l. 



Tig.4-. 



Tig. 5. 



Shell C. 



Hy.1. 



^•2. Fy.5. 



Shell D. 



» s> 



a 5. 



^.4. 



J^.2. 



,ShcU E 



^1^/on.^a^. 



Fy.%. 



^3. 



%4. 





>» JV. J^fintf (^* 



ANishcd Tiy C kJtJaldwm.oflfew Bridge Slreai.l0n3cn,iio8. 



