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



Streblospio Benedicti Webster. 



FiG. 60. — Head aud first segment, without teutacles, showiug origin of branchise 

 side view, X 130. 

 61. — Head, dorsal view, X 130. 

 62. — Fourtli 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. sp. 



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



66, — Head without tentacles, X 25. 



67, — Fourth segment, transverse section, X 25, 



68, — Sixth segment, transverse sectioTi, X 25. 



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



70. — Dorsal seta, X 450, 



71, — Anterior ventral seta, X 450. 



72, — Ventral uncinus, X 450. 



NiCOLEA VIKIDI8 n, *p. 



Fig. 73, — Anterior brauchia, X 70. 

 74. — IJuoimis, x 750. 



J^ISTA INTERMEDIA 71, Sp. 



Fig, 75, — Single branch of brauchia, X 3.5. 

 76, — Long capillary seta, X 130. 

 77. — Short capillary seta, X 130. 

 78. — Anterior uncinus, X 450. 



PLATE VII. 



PlSTA PAI.MATA ( JWHll). 



Fig. 79. — Anterior uncinus, x 450. 



PoTAMiLLA NEGi.ECTA Malmgren. 



Figs. 80,81. — Anterior capillary set:e, x 230. 

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

 Fig. 84. — Anterior uncinus, X 230. 



ThaUMASTOMA SINGUL.ARK 11. </., H. 8p. 



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



86, — Anterior end of proboscis, X 15, 



87, — One-half of second s»'gnient, 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. — Seta' from first segment, X 85. 

 Fi<;. 94.— Ordinary seta, X 85, 



