CAT. CHAETOPODA BRIT. MUS. I 



Plate IX. 



S.P- 



CE.Gl:- 



- -CE.Gl. 



~NpM 



Fig. 20. 



Arenicola branchiaLls. 

 Audouin & Edwards. 



ArenicolcL ecaudcuta Johnston. 

 Male speciTnen. 



A. K.Maxwell del. 

 E.Wilson, Cambridge. 



