Clare Island Survey — Archiannelidu and Polychaeta. 47 155 



Fig. 



4 c. Third foot, x 330. 



4 D. Sixteenth foot, x 330. 



4 E. Setae from third foot. x 850. « = spine; b = dorsal simple seta; 

 c = compound seta with short tip ; d= compound seta with long- 

 tip. 



4 F. Setae from sixteenth foot. x850. « = spine; b = dorsal simple seta; 



c = compound seta with short tip ; d = compound seta with long tip. 



5. Pionosyllis serrata sp. n. 



5 A. Anterior end. x 74. 

 5 B. Posterior end. x 74. 



5 c. Anterior end of alimentary canal, showing tooth, x 100. 



Plate IV. 



5. Pionosyllis serrata sp. n. (continued). 

 5d. Typical foot. x210. 



5e. Setae, x 800. a = spine; 5 = dorsal seta, with long tip; c = ventral 

 seta, with short tip. 



6. Opisthodonta pterochaeta sp. n. 



6 A. Anterior end, showing pharynx and proventriculus. x 42. 

 6 B. Anterior end. x 115. 



6 c. Thirteenth foot, x 160. 



6 D. Foot from middle of body, x 160. 



6 E. Tooth in the pharynx, greatly enlarged. 



6 F. Setae of thirteenth foot, x 850. a = spine ; b = compound seta ; c = tip 



of compound seta on edge. 

 6 G. Setae from mid- body, x 850. a = spine ; b = compound seta ; c = simple 



dorsal winged seta ; d = simple ventral seta. 



Plate V. 



6. Micro phthalmus Sczelkowi Mecznikow. 

 6 A. Anterior end, dorsal view, x 100. 



6 B. Posterior end, dorsal view, x 230. 



6 c. Posterior end, lateral view, x 230, 



6 D. Fourteenth foot, x 250. 



6 E. Setae of fourteenth foot. xll50. a = Pectinate seta from dorsal 



lobe ; b = compound seta from middle of foot ; c = seta with short 



tip from ventral part of foot. 



7. Microphthalmus aberrans (Webster and Benedict). Setae, in dorsal 



division of foot, x 1150. 



U2 



