HELICIDvE. 



PLATE 32 



J! }\ 



V" '>' / 



>v ,-,." ' 



^Sg^sfisSP^^ 

 \ 20 



21 





25 



32 



37 



4-4 



22 



33 



24' 



26 



27 



35 36 



39 



< 



41 



X 



40 



* 



33 



28 



29 



30 



4/6 



4-3 



4-8 



49 



50 



