Plate 14 



Height of Spines 



POWELL RIVER 



Groups 1—5 



Group 2. 1. . ■ , ■ , 



Group 3. -..-.....„„ 



Group A 



Group <5. ««. .«. .^ .«. .*M 



101 



91 



81 

 8 

 8 

 7 

 7 

 6 

 6 

 5 

 5 

 4 

 4 

 3 

 3 

 2 



as o.a I 



Height of Spines 



3.3 



5.8 



4.3 



lOOOi 



950 



Plate 15 



Height of Spines 



CLINCH RIVER 



GROUP36— I I 



Group 6. 



Group 7. ._.^, 



Group 9- * — — — — «. 

 Group 10. ^ _^ _^ ^ _^ 

 Group//. 





V 



-j:^^ 



13 0,8 1.5 l.i 



Height of Spines in mm. 



5.3 



3,i 



4.3 



lOi 

 9 



f^ttnc_e.y»/. 



