﻿152 REFERENCES TO PLATES. 



Fig. 20. — The same as fig. 19, more highly magnified, exhibiting the apparent arrangement of the emitted 



structure. 

 Fig. 21. — A second variety of the filiferous capsules, with the apparent arrangement of the emitted structure. 

 Fig. 22. — Cells of Escharina lineata. Magnified. 

 Fig. 23. — Cells of Escharina pediostoma. Magnified. 

 Fig. 24. — A. retracted polype of Alcyonidium? pellucidum. Magnified. 

 Fig. 25. — Pedicellina americana. Magnified. 

 Fig. 26— 32. — Cepon distortus. Highly magnified. 

 Fig. 26. — Posterior view of the male. 

 Fig. 27. — Head of male, with the antennae. 

 Fig. 28. — A right foot of the male. 



Fig. 29. — The abdominal segments of the male, with peculiar appendages (branchial ?). 

 Fig. 30. — Dorsal view of the female. 

 Fig. 31. — Ventral view of the female. 

 Fig. 32.— A foot of the female. 

 Fig. 33. — Clava multicornis. Magnified. 

 Fig. 34. — Clava multicornis, with bunches of ova. Magnified. 



Fig. 35. — Hydractinia echinata. a, neuter individuals ; b, ovigerous individuals. Magnified. 

 Fig. 36. — Polypidom of Laomedea dichotoma. 

 Fig. 37. — Cells of Escharina variabilis. 

 Fig. 38. — Bowerbankia gracilis. 

 Fig. 39 — 43. — Cirrhatulus fragilis. 



Fig. 39. — The worm, having many of the cirri broken off. 

 Fig. 40. — Side view of the head. 



Fig. 41. — Extremity of one of the cirri, more highly magnified. 

 Fig. 42. — Fasciculus of setae. 

 Fig. 43. — One of the podal hooks. 

 Fig. 44. — One of the setae of Terebella ornata. 

 Fig. 45. — One of the podal hooks of Terebella ornata. 

 Fig. 46. — Anterior extremity of Naraganseta coralii. 

 Fig. 47. — One of the setae of Naraganseta coralii. 

 Fig. 48. — One of the podal hooks of Naraganseta coralii. 

 Fig. 49. — Pinna from the anterior third of Glycera americana. 

 Fig. 50. — Pinna from the posterior third of Glycera americana. 

 Fig. 51. — Two views of one of the setse of Torquea eximia. 

 Fig. 52. — Podal hook of Torquea eximia. 

 Fig. 53. — Head of Sigalion Mathilda;. 

 Fig. 54. — Head of Lepidonote armadillo. 

 Fig. 55. — Tentaculas of Sabella oculifera. a, eye-spots. 

 Fig. 56. — One of the tentaculae of Sabella oculifera. a, eye-spots. 

 Figs. 57, 58.— Two forms of setae of Sabella oculifera. 

 Fig. 59. — One of the posterior podal hooks of Sabella oculifera. - 



Figs. 60, 61. — Associated setae and podal hook from the anterior part of the body of Sabella oculifera. 

 Figs. 62, 63. — Leucophrys cochleariformis. 

 Fig. 64. — A podal hook of Lumbriculus tenuis. 



