EXPLANATION OF PLATE XXII. 

 Nereis chilkaensis, sp. nov. 



Fig. 8a. — Anterior end, dorsal view, x 12. 

 „ 8b. — Anterior end, dorsal view, of a small male specimen, apparently com- 

 mencing its metamorphosis, with partially extruded proboscis. The 

 eyes are larger and the tentacular cirri relatively longer than in fig. 

 8a. X 26. 



— Anterior end, ventral view, of a small specimen. X 12. 



— Dorsal view of 26th and 27th segments. X 12. 



— -ist left foot, front view, x 56. 



— 10th right foot, posterior view, x 56. 



— 50th left foot, front view, x 56. 



. — 60th right foot, posterior view, of small male specimen shown in fig. 

 8b. x 150. 



— 25th left foot, posterior view, of ? Heteronereis. X 40. 



. — 40th left foot, posterior view, of same specimen. X 40. 



— -19th right foot, posterior view, of d Heteronereis. X 56. 



. — 30th right foot, posterior view, of same specimen. X 56. 



— Homogomph seta with slender terminal piece, from the dorsal division 

 of the 20th foot. X 560. 



— Heterogomph seta with falcate terminal piece, from the ventral division 

 of the 20th foot. X 560. 



— Terminal piece of one of the short thick heterogomphs from the upper 

 part of the ventral division of the 65th foot. X 560. 



— Tip of the shaft of one of the swimming setae of the Heteronereis, 

 from the 30th foot. X 560. 



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