322 CEYLON PEARL OYSTER REPORT. 



Fig. 100. Onuphis dihanchiata. Acicular seta from first foot. Z. 3 D. 



101. Onuphis hohh ranch lata. Tube about natural size. 



102. Eunice martensi. Right 46th foot. 

 103. Compound seta from 168th foot. 



104. Acicular seta from same foot. 



105. Paramarphysa mientalis. Compound seta from anterior region. 



106. Aglaurides fulgida. Head removed, showing submedian eyes in groups, two large lateral eyes 

 and three occipital antenna?. 



PLATE V. 



Fig. 107. Aglaurides fulgida. Right set of upper jaw-pieces from the side. 

 ,, 108. Aracoda obscura. A jaw-piece of the first pair (left side). 



109. ,, Jaw-piece of the second pair (left side); fracture at the point marked *. 



,, 110. ,, Right set of jaw-pieces. 



,,111. ,, Anterior end. 



,,112. Ventral seta. Z. 3 C. 



,, 113. Glycera Iwncadivce. Articular ends of shafts of compound setae, of form A. Z. 3 D. 

 ,, 114. ,, Portion of a seta of form B. Z. 3 D. 



,, 115. ,, Parapodial ligules of form A. Z. 3 A. 



,, 116. ,, Parapodial ligules of form B. Z. 3 A. 



117. Polijdura hornelli. One of the modified acicular setae of the fifth segment. Z. 3 D. 

 ,, 118. Nbtomastus zeylanicus. Anterior end in left side view showing the half -retracted prostomium, 



the " tongue " below it, the first and second achastous segments, and the first setigerous 



segment. 

 119. Notornastus zeylanicus. Unciniform or acicular seta. Z. 3 J. water iuim. 

 ,, 120. Armandia lanceolata. Anterior end from above; 1, tentaculum impar ; 2, nuchal organ; 



3, rostrum ; 4, anterior portion of metapleural fold. 

 121. Pohjophthalmus australis. Anterior end from above showing pigment tracks and nuchal organs. 

 122. Nicomache truncata. Anterior fragment from the left side. Actual length 47 millims. ; width 



5 millims. 

 ,, 123. Nicomache truncata. Frontal view of head. 

 ,, 124. Ammochares mientalis. Anterior end from below. 

 ,, 125. ,, From above (dorso-lateral), showing three capillary fascicles in front of 



the first pair of tori. 

 ,, 126. Ghatopferus appendiculatus. Modified seta from 4th foot. Z. 3 C. 

 ,, 127. Phyllocha'topterus herdmani. Anterior end from above. First pair of spirally coiled tentacles 



are lost. 

 ,, 128. Phyllocha'topterus herdmani. Modified seta from 4th foot. Z. 3 C. 



129. ,, Modified seta from 3rd foot of an aberrant individual. Z. 3 C. 



,, 130. ,, Plan of one of the branchial segments. 



,, 131. Spatulate seta from first parapodium. Z. 3 C. 



,, 132. Abdominal uncinus. Z. 3 D. 



,, 133. Phyllocha'topterus ramosus. Branching tube. 



,, 134. ,, Modified seta from 4th foot in side view. Z. 3 A. 



135. ,, Modified seta from 4th foot of another specimen in back view. Z. 3 A. 



,. 136. Lower portion of an uncinus from a branchial segment. 



., 137. Pectinaria panava. Uncinus from a posterior torus. 

 ,, 138. Hetcrocirrus typhhps. Anterior region from above. 



