1910.] NATURAL SCIENCES OF PHILADELPHIA. 401 



Fig. 72 — Two setae of ventral neuropodial row of X, X 56. 



Fig. 73 — Tip of the smaller seta shown in fig. 72, slightly turned to show 



flattened concave surface, X 250. 

 Fig. 74 — End of one of the more dorsal pinnate setae from the ventral 



neuropodial fascicle of II, X 250. 

 Fig. 75 — Portion of a slender spinous neuropodial seta from a caudal 



parapodium, X 360. 



Aphrodita refulgida — figs. 76-84. 



Fig. 76 — Dorsal papilla?, X 56. 



Fig. 77 — Dorsal fimbriated organ from XV, X 56. 



Fig. 78 — Head (peristomial parapodia of right side omitted; dorsal ten- 

 tacular cirrus, added from cotype), X 9. 



Fig. 79 — notopodial seta (in two pieces) from dorsal fascicle of X, X 24. 



Fig. SO — -Tip of another of the same, showing the sheath sometimes present, 

 X 250. 



Fig. 81 — a, b and c, outlines of ends of dorsal, middle and ventral neuro- 

 podial setae respectively, from X, X 56. 



Fig. 82 — End of a seta from near dorsal part of ventral neuropodial fas- 

 cicle of II, X 250. 



Fig. 83 — End of one of the shorter, slender spinous neuropodials from caudal 

 parapodia, X 250. 



Fig. 84 — Portion of end of elongated neuropodial from caudal region, 

 X 250. 



Aphrodita castanea — figs. 85-97. 



Fig. 85 — Head of cotype (Sta. 4,468). The right peristomial foot exhibits 



an abnormal condition in the presence of two dorsal tentacular cirri, X 9. 

 Fig. 86 — Fimbriated organ from XII, X 24. 

 Fig. 87— Two dorsal papillae, X 250. 

 Fig. 88 — Hooked tips of two notopodial setae from dorsal fascicle of X 



(cotype sta. 4,482), X 250. 

 Fig. 89 — Superficial roughening of small portion from middle of a dorsal 



notopodial of X (cotype), X 250. 

 Fig. 90 — Tip and small portion of dorsal felt fiber of middle segment, X 600. 

 Fig. 91 — Same of lateral fiber, X 600. 



Fig. 92 — a, b and c, dorsal, middle and ventral neuropodial setae respec- 

 tively (cotype sta. 4,482) of X, X 56. 

 Fig. 93 — Pinnate seta from middle of ventral neuropodial fascicle of II, 



X 250. 

 Fig. 94 — Short spinous ventral neuropodial of caudal region, X 250. 

 Fig. 95 — Long same, X 250. 

 Fig. 96 — Tip of notopodial from caudal region showing the sticky hairy 



surface. X 600. 

 Fig. 97 — Portion of middle of lateral fiber from caudal region showing same 



condition, X 600. 

 Figs. 85, 88, 89, 92, 93, 94, 95, and 98 were drawn from a cotype (sta. 4,482). 



Plate— XXXIII. 



Fig. 98 — -Ventral neuropodial seta from somite X of A. castanea, X 250. 



Leanira alba — figs. 99-104. 



Fig. 99 — Dorsal view of anterior end, with second right and third left 



elytra in place, right side not completed, X 9. 

 Fig. 100 — a, b and c, parapodia II, XXV and L, respectively, anterior 



views without seta, X 17. 

 Fig. 101 — a and b, outlines of elytra IX and XXXIX, respectively, X 9. 

 Fig. 102 — Profile view of an average, anterior, subacicular neuropodial 



seta of XXV, X 250. 

 Fig. 103 — An extreme dorsal neuropodial seta from XXV, X 250. 

 Fig. 104 — a and b, basal and middle portions of a notopodial seta from 



XXV, X 440. 



