EXPLANATION OF PLATE IX. 



POLYDORA HAMATA 71. Sp. 

 Page 251. 



Fig. 117. Loug seta of posterior segments, X 450. 

 Fig. 118. Anal plates, X 25. 



POLYDORA C^CA 71. Sp. 

 Page 252. 



Fig. 119. Long dorsa! seta, X 450. 

 Fig. 120. Short dorsal seta, X 450. 

 Fig. 121. Setae of 5th segment, X 230. 

 Fig. 122. Bidentate ventral seta, X 450. 



Artcia rubra n. sp. 



Page 253. 



Fig. 123. Anterior ventral setae, X 450. 



Fig. 124. Long ventral seta, X 450. 



Fig. 125. Transverse section of anterior segment, X 20. 



Fig. 126. Transverse section of posterioi- segment, X 20. 



Aricidea fragilis 71. sp. 

 Page 255. 



Fig. 127. Head and anterior segments, X 40. 

 Fig. 128. Transverse section of anterior segment, magnified. 

 Fig. 129. Transverse section of posterior branchiated segment, mag- 

 nified. 



Fig. 130. Transverse section of non-branchiated segment, magnified. 



Fig. 131. Dorsal seta, X 450. 



Fig. 132, a, b. Ventral set£E, X 450. 



Sabellaria varians n. sp. 

 Page 259. 



Fig. 133. Opercular seta of outer series, X 70. 

 Fig. 134. Opercular seta of middle series, X 70. 

 Fig. 135. Opercular seta of inner series, X 70. 

 Fig. 136. Dorsal seta of 3d segment, X 230. 



