EXPLANATION OF PLATE XX. 

 Dendronereis aestuarina, sp. nov. 



Fig. 4A. — Anterior end, dorsal view, x 17. 



4B.— Everted proboscis, ventral view, x 17. 



4C. — 10th segment, ventral surface. X 20. 



4D. — ist right foot, front view. X 40. 



4E. — 10th right foot, front view. X 40. 



4F. — 15th right foot, front view. X 40. 



4G. — Dorsal cirrus of 17th foot. X 30. 



4H. — 18th right foot, front view. X 25. 



4J. — Ventral division of the 20th right foot, front view. Setae not shown. 

 X 40. 



4K. — 30th right foot, front view. Setae not shown. X 25. 



41,. — Homogomph seta with long finely serrated terminal piece, as found in 

 all the feet. X 330. 



4M.- — Homogomph seta with long coarsely serrated terminal piece, from 

 the 3rd foot. X 560. 



4N. — Homogomph seta with moderately short smooth tip, from upper divi- 

 sion of the 60th foot, X 330. 



Stcrnaspis costata, Marenzeller. 



Fig. 5A. — Ventral shield. Only the basal portion of the lateral bundles of setae 

 shown. X 40. 

 ,. 5B. — Tip of dorsal seta from ist bundle. X 330. 



