Johnson.— Polychaeta. 
PLATE 16. 
Fig. 162. Anterior extremity of Sahellides anops , dorsal aspect. Branchiae on 
right side have been cut off at the base. The somites 1-5 are 
numbered. X 9. 
Fig. 163. Prostomium and tentacles of the same, dorsal aspect. X 15. 
Figs. 164-168. Amphitrite robusta. 
Fig. 164. Gill, mounted in glycerine. X 6. 
Fig. 165. Seta from thorax. X 187. 
Fig. 166. Uncinus from eighteenth somite, in profile. X 321. 
Fig. 167. Biserial arrangement of uncini, thoracic region. X 321. 
Fig. 168. Uncinus from near posterior end. X 321. 
Figs. 169-171. 
Amphitrite spiralis. 
Fig. 169. One of the main branches of a gill. X 15. 
Fig. 170. Seta from eighteenth (thoracic) somite. X 321. 
Fig. 171 a, b. Uncini from eighteenth somite, profile. X 321. 
Fig. 171 c. Uncinus, anterior aspect, showing five rows of teeth above rostrum. 
X 350. 
