27 c. 



27 d. 



28. 



28 a. 



28 b. 



28 c. 



28 a 



28 E. 



28 F. 



Clarr Island Survey — Archiannelida and Polychaeta. 47 159 

 Plate XII. 



Fig. 



27. Chaetozone aluta sp. n. 

 27 a. Anterior end, dorsal view, x 56. 



27 B. Capillary setae, x 570. a = long cylindrical dorsal seta from sixth 

 segment ; b = short flattened dorsal seta from sixth segment ; 

 c = slender capillary seta accompanying crochets in ventral and 

 posterior dorsal segments. 

 Ventral crochet from the sixth segment, x 1150. 

 Ventral crochet from the eighty-sixth segment, x 1150. 



Chaetozone killariensis sp. n. 



Anterior end, dorsal view, x 56. 



Short thick capillary seta from the eighth segment, x 586. 



Upper dorsal crochet from a posterior foot, x 586. 



Ventral setae from a posterior foot, x 586. a = upper capillary seta ; 



b = upper crochet ; c = lower crochet. 

 Tip of ventral crochet shown in previous figure (c). x 850. 

 Transverse section of a posterior segment, to show the arrangement of 



the setae, x 146. 



29. Chaetozone zetlandica Mcintosh. " Stage A." 

 29 A. Anterior end, dorsal view, x 56. 



29 B. Transverse section of a posterior segment, to show the arrangement of 

 the setae, x 146. 



Plate XIII. 



29. Chaetozone zetlandica Mcintosh. " Stage A." (continued). 

 29 c. Figure of entire animal, side view, x 25. 



29 d. Anterior end, side view, x 56. 



29 e. Posterior end, dorsal view, x 85. 



29 F. Short thick dorsal capillary seta from an anterior segment, x 574. 



29 G. Bifid crochet from middle of ventral division of a posterior segment. 

 x574. 



29 H. Tip of crochet in previous figure, x 740. 



29 J. "Stage B." Tips of setae in the ventral division of a posterior foot. 

 x574. «= lowest crochet; b= crochet next above "a"; c = the 

 two upper crochets ; <^ = tip of thick capillary setae. 



29 K. " Stage C." Tips of lowest crochets in the ventral division of posterior 



feet, showing indication of bifid termination, x 574. 



30. Thelepides collaris gen. et sp. nov. 



30 A. Anterior end, dorsal view, x 18. 

 30 B. Anterior end, ventral view, x 18. 



30 c. Long capillary seta from the fifth setigerous segment, x 660. 



