0.41-0.6 



0.61 -0.8- - 



0.81 — 1 



1.01 — 1.2 



1.21-1.4 



Average relative thickness (thickness 

 X 10000 : length) of the amphio.xes 

 of these sizes of both specimens 

 CO together. 



en 



1.41 — 1.6 



1.61-1. 



1.81-2 



2.01-2.2 



2.21—2.4 



2.41 



2.61 — 2.8- 



o 

 o 



O 

 w 

 o 



3 



o 



tSi 



c 

 ■a 



(T) 



ro 



3 

 EL 

 w 



3 



w 

 w 



CO 



3 



1- 



o' 



Fig. 17. — Amphioxes. 



