LIST OF TEXT-FIGURES 



Fig. 1. Arenicola loveni. Anterior end, dorsal aspect 



Fig. 2. A. pusilla. Anterior end, dorsal aspect ..... 33 



Fig. 3. A. brancJiialis. Anterior end, dorsal aspect .... 34 



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



Fig. 5. A, ecaudata. Outline of the posterior end of a post-larval 



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



Fig. 6. A. ecaudata. Crotchet from one of the posterior notopodia of 



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



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



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



Fig. 8. A. pusilla. Notopodial chaetae of larvae .... 41 



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



4'3 mm. long ......... 42 



Fig. 10. A. ecaudata. 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. Tips of unworn and worn notopodial chaetae 



(adult) . . . .' 45 



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



Fig. 14. A. assimilis var. affinis. Distal third of a notopodial chaeta 



(adult) . .' ... ..' .... 46 



Fig. 15. A. pusilla. End of a fractured chaeta (adult) . ... 47 



Fig. 16. A. ecaudata and A. branchialis. Distal portions of notopodial 



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



Fig. 17. A. 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 var. affinis. Crotchets from a post-larval specimen, 



7 "6 mm. long ......... 50 



Fig. 22. A. assimilis var. affinis. Crotchets from specimens 136 mm. 



and 208 mm. long ........ 51 



