PLATE 61. 

 Lumbrinereis bifilaris Ehlers. 

 Figure 1. 

 1. — Crochet, from caudal region. 



Cenothrix mutans Chamderlin. 

 Figiu-es 2-9. 



2. — Maxillae, dorsal view. X 76. 



3.— Mandibles. X 76. 



4. — Anterior region of body, ventral view. X 32. 



5. — Dorsal seta and aciculum of middle region. X 495. 



6. — Crochet, viewed from edge. X 495. 



7. — Another crochet, side view. X 495. 



8. — Limbate seta of first type from middle region. X 495. 



9- — Parapodium from middle region, anterior view. X 117. 



