PLATE 1. 



Harmothoe mexicana Chambeklin. 



Figures 1-9. 



1. — ^^nterior end, dorsal view (style of median tentacle broken off; tentacular cirri in outline). 



X27. 

 2. — Twenty second right parapodium, caudal view. X 18. 

 3.— First eh-tron. X 21. 

 4. — Small portion of same eljrtron. X 187. 

 5.- — Neuropodial seta, common form. X 108. 

 6. — Neuropodial seta, second form. X 108. 



7. — Small portion of neuropodial seta, common form, viewed from edge. X 1073. 

 8. — The same, viewed from side. X 1073. 

 9. — Notopodial seta, distal portion, side view. X 63. 



