HELICID^C. 



PLATE 41 



69 



70 



66 



67 



Pi 

 68 





<0 



83 84 * 85 



80 



77 78 



ft? 



79 



86 87 88 



V 



95 



96 



97 



<c. 



100 



92 



89 90 91 



rp* 



94 



93 



^ 



-p** 



8 9 





20 



21 



11 



12 



V > 

 18" 19 



j^ <% e 



13 14 15 



16^ 17 



