MUSEUM OF COMPARATIVE ZOOLOGY. 205 



PLATE III. 



Lepidonotus, Telepsavus, and Phyllochaetopterus. 



ce. Qisophagus. 

 pi. Prffioral lobe, 

 s. .Stoniacli. 

 t. Tentacle. 

 vg. Ventral gland. 



Fig. 1. Side view of a young larva of Lepidonotus. 



" 2. Ventral view of a still more advanced larva of Lepidonotus. 



" 3. Older larva of the same. 



" 4. Oldest larva of Zc/)iVZo?2o/«s (dorsal view). 



" 5-15. Telepsavus (?). (Figs. 8-15 drawn by A. Agassiz.) 



" o^ Youngest larva of Tehpsaims (dorsal view). 



" 6. Older larva of Telepsavus (ventral view). 



" 7. Side view of the last. 



" 7'. Tail of the last. 



" 8. Older larva of Telepsavus. 



" 9. Side view of the last. 



" 10. Side view of a still older larvn. 



'• 11. A larva still older (dorsal view). 



" 12. Oldest Telepsavus larva. 



" 13. Mouth and pra?oral lobe of the same. 



" 14, 15. Differently formed spines of the oldest larva. 



" lG-18. La.r\x of Phijllochu'topterus ('.). 



" 16. Youngest larva of P/iyUochatopterus. 



" 17. Side view of the same. 



" 18. Older larva of the same. 



" 19, 20. Larvffi of Capitella. 



PLATE IV. 



Nephthys and Lepidonotus. 



dc. Dorsal cirrus. w. Mouth. 



i. Intestine. ps. Pigment spots. 



j. Jaws. s. Stomach. 



k. Cephalic spots (ocelli ?). vc. Ventral cirrus. 



Fig. 1. Youngest larva of A^if'/)////(if.s. 



2. Older larva of the same. 



3. The same. 



4. Still older Inrva from the ventral side. 



5. Later sta<_je (ventral view). 

 5^. Lateral view of the last. 



6. Larva with well-developed ]iarapodia. 

 G''. Single parapodiuni of the .same. 



