PLATE 48. 



Onuphis socia Chamberlin. 



Figures 1-4. 



1. — -Fifth branchia, dorsal view. X 45. 



2. — Eleventh right branchia. X 45. 



3. — • Thirteenth left branchia, dorsal view. X 45. 



4. — Thirty fourth right branchia, sublateral view. X 45. 



Onuphis pachytmema Chamberlin. 

 Figures 5-11. 



5. — First left parapodium, ectal view. X 27. 



6. — Second left parapodiiun, ectal view. X 27. 



7. — Fourth parapodium, ectal view. X 27. 



8. — First right branchia, with notocirrus. X 45. 



9. — Third left branchia, with notocin'us. X 45. 

 10. — Fifth left branchia, with notocirrus. X 45. 

 11. — Last distinct left branchia of type. X 45. 



