1897.] 



ME. E. T. BROWNE Olf BKITISH MEDUSA. 



819 



Diagrams to show development of the branches of the radial canals. Aboi-al 

 view. M, main canal. 1, first branch. 2, second branch. 3, third 

 branch. 



Fig. 1. 



La7' sabellarum. 

 First stage. Six canals without branches. 



Fig. 2. 



Lar sabellarum. 

 Second stage. Each canal with one branch. 



