POLYCH^TA-BENHAM. l2l 



Lumbriconereis macquariensis (figs. 76-81). 

 Fig. 76. Head, ventral view (enlarged). 



77. The 8th parapod (camera, x 90). 



78. A posterior parapod ( X 90). 



79. The only articulated hook which was found (X 360) ; it occurred in an anterior 

 parapod. 



80. The usual form of hook, taken from the 25th parapod ( x 360), as seen from 

 the side and from in front, showing the denticulated lower portion of the 

 hood. 



81. A capilliform chaeta from 8th foot ( X 250). 



SpTwerodorum spissum (figs. 82-84). 

 Fig. 82. Entire animal drawn from the unstained cleared specimen (camera, X 20). 



83. Anterior end of the same ( x 70) camera outline. The prepharyngeal region 

 is shown in surface view, except the eye vesicles (?), but the pharynx is at 

 a deeper level ; the dark patches in front of it are glands; the bundles of 

 chsetse lie really below the rest, on the ventral surface. 



84. The posterior end ( x 70), surface view. 



PLATE 9. 

 Sphcerodorum spissum (figs. 85-89). 



Fig. 85. Portion of the surface of the stained specimen ( X 35), showing the ventral 

 surface and a portion of the animal's right side. The outline is drawn under 

 the camera, but details are filled in from various parts of the surface. 



86. A portion of the margin of the same preparation (X 45), showing the absence 

 of any definite alternation in size of the papillae. 



87. A papilla (magnified; freehand). 



88. A parapod (magnified; freehand), seen from below. Note the thickness of 

 the cuticle. 



89. A chaeta (magnified; freehand). 



Aricia marginata var. mcleani (fig. 90). 



Fig. 90. One of the anterior neuropods with the additional series of spines behind and 

 below the third row. 



Scolaplos mawsoni (figs. 91-94). 

 Fig. 91. The parapod from the 7th segment ( X 45). 



92. Parapod from the 24th ( X 45). 



93. From the 32nd ( X 45). 



94. From the 53rd segment ( X 45). 



83892 Q 



