Lewis. — Nervous Syst. Polychaeta. 



PLATE 7, 



Figs. 48-52. Sections through sense organs of A. forquata, showing sensory cells 



stained witli niethylen blue. X 750. 

 Figs. 53-62. Cells from the central nervous system of A. torquata, stained with 



methylen blue. X 750. 

 Figs. 63-65. Ordinary hypodermis cells from A. torquata, stained with methylen 



blue. X 750. 



