260 PROCEEDINGS OF THE ACADEMY OF [April. 



P'ig. 25. — Profile \'iew, and a face view, of the end of one of the same. 

 X 800. 

 Maldane similis — figs. 26-30. 



Fig. 26.— Slightly w-inged seta from II. X 333. 



Fig. 27. — Hispid capillary seta from somite XV. X 480. 



Fig. 28.— End of crochet from somite III. X 480. 



Fig. 29.— Entire crochet from X. X 110. 



Fig. 30.— Distal end of the same. X 480. 

 Maldanella rohusta — figs. 31 and 32. 



Fig. 31. — Two entire crochets from somite XV. X 110. 



Fig. 32.— The end of one of the same. X 480. 

 Clymenella tentaculata — figs. 33-35. 



Fig. 33. — Middle crochet from somite II, entire. X 110. 



Fig. 34.— End of the same. X 480. 



Fig. 35.— End of a middle crochet from V. X 480. 

 Nicomache coronata — figs. 36-39. 



Fig. 36. — Small portion of a fiber seta froin somite X. X 800. 



Fig. 37. — End of a crochet from somite V. X 480. 



Fig. 38. — An entire crochet from somite XV. X 110. 



Fig. 39.— End of the same. X 480. 

 Plate XII. — Lumbrichymene pacifica — figs. 40-42. 



Fig. 40.— End of a spine from II. X 98. 



Fig. 41. — An entire crochet from somite X. X 83. 



Fig. 42.— End of the same. X 440. 

 Nicomache coronata — figs. 43 and 44. 



Fig. 43. — SmaU seta from somite X. X 360 ; a, small portion of the same. 

 X 600. 



Fig. 44. — Large seta from somite X. X 360. 

 Sabellaria cementarium — figs. 45-51. 



Fig. 45. — Three spines forming a middle segment of the operculum, 

 shown in profile in as nearly as possible their natural relations: 

 i inner, m middle, and o outer spines. X 32. 



Fig. 46. — A face \iew of the end of an outer spine. X 32. 



Fig. 47. — Middle notopodial seta from somite III. X 32. 



Fig. 48. — Portion of an ensheathed capillary notopodial seta from somite 

 XX. X 440. 



Fig. 49. — Bipinniform neuropodial seta from II. X 98. 



Fig. 50. — A portion of the middle of the same. X 440. 



Fig. 51. — Middle abdominal uncinus. X 440. 

 Samytha bioculata — figs. 52 and 53. 



Fig. 52. — Uncinus from somite X of type. X 600; 52, the same from 

 somite X of the cotype, somewhat foreshortened. X 600. 



Fig. 53.— Uncinus from somite XXV. X 600. 

 Arnphicteis scaphobranchiata — figs. 54-61. 



Fig. 54. — Dorsal aspect of anterior end of type, with branchiae cut away 

 and separated to show the prostomium. X 9. 



Fig. 55. — Ventral aspect of the same with the branchise in place. X 9. 



Fig. 56. — Distal portion of one of the anterior middle branehise. X 9. 



Fig. 57. — One of the abdominal parapodia. X 24. 



Fig. 58. — A paleolus from the middle of the fasciculus. X 83. 



Fig. 59.— A seta from somite X. X 250. 



Fig. 60. — Two forms of uncini from somite XII, the five-toothed one i 

 somewhat foreshortened. X 600. 



Fig. 61.— An uncinus from XXV. X 600. 

 Chone gracilis — figs. 62-66. 



Fig. 62. — A small bent seta from somite V. X 360. 



Fig. 63.— A winged seta from XXI. X 250. 



Fig. 64. — A spatulate and mucronate seta from VI. X 360. 



Fig. 65.— A crochet from VI. X 360. 



Fig. 66.— An uncinus from XXI. X 360. 



