LIST OF TEXT-FIGURES 



PAGE 



Fig. 1. — Arcnicola loveni. Anterior end, dorsal aspect ... 33 



Fig. 2. — A. inisilla. Anterior end, dorsal aspect ..... 33 



Fig. 3. — A. hrancliialis. Anterior end, dorsal aspect .... 34 



Fig. 4. — A. assimilis var. affinis. Anterior end, dorsal aspect . . 39 



Fig. 5. — A. ccaudata. Outline of the posterior end of a post-larval 



specimen, 8 mm. long, to show the chaetae .... 40 



Fig. a. —A . ecaudata. Crotchet from one of the posterior notopodia of 



the same specimen ........ 40 



Fig. 7. — .4. cristata. Outline of a larva, about '7 mm. long, to show 



the chaetae ......... 41 



Fig. 8. — A. yusilla. Notopodial chaetae of larvae . . . .41 



Fig. 9. — A. ■marina. Notopodial chaetae of a post-larval specimen, 



4"3 mm. long ......... 42 



Fig. 10. — A. ccaudata. Distal halves of notopodial chaetae, from post- 

 larval specimens about 7 mm. long ..... 42 



Fig. 11. — A. loveni. Distal third of a notopodial chaeta, from a specimen 



335 mm. long ......... 44 



Fig. 12. — A. cristata. Ti^js of unworn and worn notopodial chaetae 



(adult) 45 



Fig. 13. — A. marina. Distal fourth of a notopodial chaeta (adult) . . 46 



Fig. 14. — A. assiniilis var. afinin. Distal third of a notopodial chaeta 



(adult) . .' 46 



¥'1^.15.— A. 2)usilla. End of a fractured chaeta (adult) . ... 47 



Fig. 16. — .4. ccaudata and A. hrancliialis. Distal portions of notopodial 



chaetae (adult) ......... 47 



Fig. 17. — ^1. marina. Crotchet from a post-larval specimen, 5 mm. long 48 



Fig. 18. — ,, Crotchet from a young adult, 17 mm. long . . 49 



Fig. 19. — ,, Crotchets from a specimen, 125 mm. long . . 49 



Fig. 20. — ,, Ventral end of the neuropodial chaetal sac of a 



specimen 250 mm. long, showing the formation of crotchets . 50 



Fig. 21. — A. assimilis v&r. affinis. Crotchets from a post-larval specimen, 



7*6 mm. long ......... 50 



Fig. 22. — A. assimilis var. affinis. Crotchets from specimens 136 nun. 



and 208 umi. long ........ 51 



