HELICID^G. 



13 



14 



20 



24 



29 



26 



* 



35 



39 i 40 



45 



46 



50 



51 



61 



63 



PLATE 4O 



16 



17 



82 



21 



32 



47 



58 



23 



* 



33 34 



4-3 



55 



f . 



60 



