EXPLANATION OF PLATE XLl. 



Halodora, sp. incert. 

 Fig. 56. — The middle region of a jointed chseta ( x 300). 



Stauroriereis australiensis, MTntosh. 



Fig. 58. — The head, dorsal view (enlarged). 



Fig. 59. — Head, dorsal view (more enlarged), with the 

 peristomial Hap turned back to show the slit-like 

 entrance to the nuchal organ on each side. 



Fig. GO. — Head, ventral view (enlarged). 



Fig. 6L — Six segments (x 4), with the parapodia of one 

 side ; the dorsal cirrus on the penultimate segment 

 has been cut across to show the characteristic flat- 

 tening in this species. 



Fig. 02. — The 80th parajjodium ( ■ 20). 



Fig. 03. — A sub-acicular cheeta from the 30th jiarapodium 



(X 250). 

 Fig. 04. — A sub-acicular chaeta from the 10th parapodium 



(X 250). 

 Fig. 05. — The upper series of jawlets of the right side, as 



seen m siki ( x 20). 

 Fig. 00. — Isolated jawlets (x 35), «., a group of jawlets of 



the outer and inner series : 6, one of the jawlets 



of the inner series ; c, anterior jawlets of the inner 



series ; d, a triangular piece which rests on the 



base of the outer and inner series. 



Eunice bassensis, MTntosh. 



Fig. 07.— The head from the side (x 8). 



Fig. 08. — The anterior end ( :< 8) ; the tentacles of the right 

 side and the parapodia of the left have been omitted. 



Fig. 09. — A segment from the side (x 8) to show the rela- 

 tively small size of the gill at its maximum develop- 

 ment. 



Fig. 70. — The twelfth parapodium ( 20), from a well 

 preserved specimen. {Cf. tig. 78). 

 —A chaeta from the 40th parapodium ( x 300). 

 —The tip of an acicular chaHa from the 40th foot 

 ( , 250) ; it is bidentate, and the wings are present. 

 —A tridentate acicular chseta from a posterior foot 

 (x 250). The wings are omitted. 

 —A tridentate acicular cha?ta from the 53rd foot 

 ( x 250), the wings are omitted. 



