ANNELIDA POLYCHAETA. 45 



EXPLANATION 



OF 



Plate 3. 



Fig. 1. Ventral bristle of Arenicola Claparedi Levins. 



(alcoh. spec), x 175 cliam. 

 Fig. la. Tip of the foregoing, surface view. 

 Fig. 2. Branchial leaf of Arenicola marina L. (alcoh. 



spec). X 20 diam. 

 Fig. 3. Ventral bristle of the same, XlXth fascicle. 



X 90 cliam. 



Ventral bristle of the same , 1st fascicle. 



Dorsal bristle of the same. Magnified. 



Branchial leaf of Arenicola cristata Stimps. (alcoh. 



spec). X 17 diam. 

 Fig. 7. Ventral bristle of the same, XVIIth fascicle. 



Magnified. 

 Fig. 8. Ventral bristle of the same, anterior region of 



the body. 

 Fig. 9. Dorsal bristle of the same. 



Fig. 10. Ventral bristle of a small specimen of A. cristata? 

 Fig. 1 1 . Dorsal bristle of the same. 

 Fig. 12. One of the branchiae of Arenicola Grubii Clprd. 



(alcoh. spec), x 15 diam. 

 Fig. 13. Ventral bristle of the same, x 175 diam. 

 Fig. 14. Ventral bristle of a specimen from the Coast of 



Portugal, x 175 diam. 

 Fig. 15. Dorsal bristle of the foregoing specimen. 



Notes from the Leyden Museum, Vol. XI. 



