488 PROCEEDINGS OF THE ACADEMY OF [June, 



Explanation of Plates XXIII, XXIV,, XXY, XXVI, XXVII. 



Unless indicated othcru-ise~ all seta; figured are jrom somite X or that immediate 



neighborhood. 



Plate XXIII, Fig. 1. — Eumidea caca, terminal portion of a neuropodial seta. 



X 480. la, the articulation of the same, X 820. 

 Fig. 2. — Polynoa semienna, middle neuropodial. X 332. 

 Fig 3. — ^The same, dorsal neuropodial. X 332. 

 Fig. 4. — Scalesetosus formosus, dorsal neuropodial. X 480. 

 Fig. 5. — Scalesetosus formosus, ventral neuropodial, outline only. X 480. 

 Fig. 6. — Scalesetosus formosus, notopodial. X 480. 

 Fig. 7. — Lepidonotus branchiferus, middle neuropodial. X 130. 

 Fig. 8. — Lepidonotus branchiferus, guard of a neuropodial seta in process of 



being shed. X 130. 

 Fig. 9. — Lepidonotus branchiferus, portion from the middle of a notopodial. 



X 586. 

 Fig. 10. — Lepidonotus chitoniformis , middle neuropodial. X 130. 

 Fig. 11. — Lepidonotus chitoniformis, portion of a notopodial. X 586. 

 Fig. 12. — Lepidonotus cceloris, middle neuropodial. X 332. 

 Fig. 13. — Lepidonotus vexillarius, dorsal notopodial. X 480. 

 Fig. 14. — Lepidonotus vexillarius, portion of middle notopodial. X 480. 

 Fig. 15. — Lepidonotus vexillarius, ventral neuropodial. X 332. 

 Fig. 16. — Hylosynda carinata, middle neuropodial. X 332. 

 Fig. 17. — Hylosynda carinata, notopodial. X 332. 

 Fig. 18. — Hylosynda magnacornuta, middle neuropodial. X 110. 



Plate XXIV, Fig. 19. — Lcetmatonice pellucida, notopodial. X 74. 

 Fig. 20. — Lcetmatonice pellucida, neuropodial. X 74. 

 Fig. 21. — Restio cenus, stout neuropodial. X 332. 

 Fig. 22. — Restio cenus, slender neuropodial. X 332. 

 Fig. 23. — Restio anus, slender seta from anterior rank. X 332. 

 Fig. 24. — Restio cenus, capillary seta. X 332. 



All of the setae figured in figs. 21-24 are from somite XV. 

 Fig. 25. — Nereis pusilla, middle notopodial. X 480. 

 Fig. 26. — Nereis pusilla, ventral neuropodial. X 480. 



Fig. 27. — Nereis pusilla, stout neuropodial from a posterior foot. X 480. 

 Fig. 28. — A'ereis paucidentata, typical notopodial. X 480. 

 Fig. 29. — Nereis paxicidentata, ventral neuropodial. X 480. 

 Fig. 30. — Nereis paucidentata, stout posterior neuropodial. X 480. 

 Fig. 31. — Aricia fimbriata, one of the stouter anterior neuropodials. X 332. 

 Fig. 32. — Aricia fimbriata, a slender anterior neuropodial. X 332. 32a. A 



portion of the same. X 586. 

 Fig. 33. — Aricia fivibriata, portion of a canaliculated posterior neuropodial 



represented as seen in optical section. X 820. 

 Fig. 34. — Aricia fimbriata, portion of a capillary posterior notopodial. 



X 820. 

 Fig. 35. — Aricia fimbriata, an incomplete bifurcated notopodial. X 586. 



Plate XXV, Fig. 36. — Eunice northioidea, compoimd seta from the middle~of 

 bundle. X 480. 

 Fig. 37. — Eunice northioidea, pectinate seta. X 480. 

 Fig. 38. — Eunice northioidea, uncinus from posterior foot. X 332. 

 Fig. 39. — ^wmce^iangMi/zc/a, compound seta from middle of bundle. X 480. 

 Fig. 40. — Eunice quinquifida, pectinate seta. X 480. 

 Fig. 41. — Eunice quinquifida, uncinus from LX. X 332. 

 Fig. 42. — Eunice mucronata, compound seta from X. X 480. 



