[45] REPORT OF COMMISSIONER OF FISH AND FISHERIES. 743 



Streblospio Benedicti Webster. 



Fig. 60.— Head and first segment, without tentacles, showing origin of branchiae 

 side view, X 130. 

 61. — Head, dorsal view, X 130. 

 62. — Fourth segment, transverse section, X 85. 

 63. — Posterior segments, transverse section, X 85. 

 64. — Posterior segments, with anal sucker, X 130. 



PLATE VI. 



Spiophanes Verrilli n. gp. 



Fig. 65. — Head with tentacles, x 25. 



66.— Head without tentacles, X 25. 



67. — Fourth segment, transverse section, x 25. 



68. — Sixth segment, transverse section, x 25. 



69. — Fifteenth segment, transverse section, x 25. 



70.— Dorsal seta, X 450. 



71. — Anterior ventral seta, X 450. 



72. — Ventral uncinus, X 4.50. 



NiCOLEA VIKIDIS n. »p. 



Fig. 73. — Anterior brauchia, X 70. 

 74.— Uncinus, X 750. 



PiSTA INTERMEDIA tl. »p. 



Fig. 75. — Single branch of branchia, X 35. 

 76. — Long capillary seta, X 130. 

 77.— Short capillary seta, X 130. 

 78. — Anterior uncinus, X 450. 



PLATE VII. 



PiSTA PAI.MATA ( Vei-nll). 



Fig. 79. — Anterior uncinus, x 450. 



POTAMILLA neglecta Malmgren. 



Figs. 80, 81.— Anterior capillary setae, X 230. 

 82,83. — Anterior pointed uncini, X 230. 

 Fig. 84. — Anterior uncinus, X 230. 



Thaumastoma singulare h. g., n. sp. 



Fig. 85. — Head and first segment, X 15. 

 86. — Anterior end of proboscis, X 15. 



87. — One-half of second segment, transverse section, X 15. 

 88. — One-half of third segment, transverse section, X 15. 

 89. — One-half of fourth segment, transverse section, X 15. 

 90. — One-half of eighth segment, transverse section, X 15. 

 91. — One-half of seventeenth segment, transverse section, X 15. 



Figs. 92, 93.— Set* from first segment, X 85. 

 Fig. 94.— Ordinary seta, x 85. 



