POLYCPUETA. 321 



Anaitis a ylaaiea. Seta in side view. 



Articular portion of seta from above. Z. 3 D. 



Prostomium. 



Dorsal phvllode. 



NiotophyUwm laciniatum. Head, as seen after removal of the anterior phyllodes. 



End of shaft of seta showing the articular fossa. 



I'hiillodoce dissotyla. Head. 



,, Parapodium. 



Portion of seta. Z. 3 D. 



The two kinds of papilla? on the proboscis. 



PhijUodori ftilinsiijHijiillafa. Head and proboscis. 

 ,, Parapodium. 



Seta. Z. 3 D. 

 Phyllodoce macrolepidota. Parapodium. 



Seta. Z. 3 D. 

 Phyllodoce sanctijosephi. Head. 



Seta. Z. 3 D. 

 Iinia limicola. Parapodium; the bundle of fine dorsal seta? proceeding from the cirrophore is 



seen crossing the basal portions of the superior ventral seta;. Z. 3 a.* 

 Trma limicola. Average compound seta. 



,, Inferior ventral seta. 



Typosyllis taprdbanensis. Seta from posterior region of larger specimen. Z. 3 D. 



,, Posterior seta of smaller specimen. Z. 3 D. 



Haplosyllis spongicola. Head. 



Pharyngeal orifice and tooth. 



PLATE IV. 



Fig. 81. Autolytus orientalis. Magnified about 1 1 times. 



82. Fore-gut removed from body. 



83. ,, Palps, mouth and tentacular cirri from below. 



84. Seta. Z. 3 J. water imm. 



., 85. Nereis unifasciata. Outline of 8th parapodium of right side seen from behind. 



86. Similar outline of 31st parapodium. 



87. Heterogomph spinigerous seta from 8th foot. Z. 3 D. 



88. Hemigomph seta from 18th foot. Z. 3 D. 



89. Ceratonereis falcaria. Dorsal seta from 27th foot. Z. 3 D. 



90. Ceratonereis pectinifera. Outline of 8th foot of right side. 



91. ,, Outline of 32nd foot. 



92. Platynereis bengalensis. Dorsal falcigerous seta of 44th foot. Z. 3 D. 



93. Superior ventral falcigerous seta of same foot. Z. 3 D. 



94. Acervus of paragnaths of group IV., and maxilla. 



95. Diopatra amioimensis. Jaws protruding, seen from below. 1, 1, mandibles or forcipate jaws; 



2, 2, serrse or saws; 3, impar; 4, 4, arcs; 5, 5, lamina; ventrales; b.s., buccal segment. 



96. Diopatra amboim n.<i*. First parapodium. Only a few seta; are indicated. 



97. Simple bidentate seta; from first foot. Z. 3 D. 



98. Omiphis basipicta. First right foot. Z. 3 A. 



,, 99. Compound setn of first foot. Z. 3 D. 



2 T 



