W. C. M'INTOSH ON BRITISH ANIsTlLIDA. 393 



PLATE LXVIII. 



Fig. 1. Dorsal bristle oi Harmothoe sibbahh'i, n. s. Magn. 350 diam. 



Fig. 2. Superior ventral bristle. Magn. 850 diam. 



Fig. 3. Inferior ventral bristle. Magn. 350 diam. 



Fig. 4. Front view of a dorsal bristle o{ H. zetlandica, n. s. Magn. 210 diam. 



Fig. 5. Superior ventral bristle. . Magn. 350 diam. 



Fig. 6. Tip of one of the longer dorsal bristles of Polynoe floccosa, Sav. Magn, 

 350 diam. 



Fig. 7. Tip of a dorsal bristle from a large specimen of H. imbricata. Magn. 350 

 diam. 



Fig. 8. Superior ventral bristle oi P. floccosa. Magn. 350 diam. 



Fig. 9. Superior ventral bristle of if. imbricata. Magn. 350 diam. 



Fig. 10. Median ventral bristle oi P. floccosa. Magn. 350 diam. 



Fig. 11. Median ventral bristle of//, imbricata. Magn. 350 diam. 



Fig. 12. Tip of a dorsal bristle of H. areolata, Grube. Magn. 350 diam. 



Fig. 13. Superior ventral bristle. Magn. 350 diam. 



Fig. 14. One of the most characteristic median ventral bristles. Magn. 350 diam. 



Fig. 15. Tip of a developing bristle of Malmgrenia castanea, n. s., showing the secondary- 

 process at the end of the spinous rows. Magn. 350 diam. 



PLATE LXIX. 



Fig. 1. Dorsal bristle oi Harmothoe zetlandica, n. s. Magn. 350 diam. 



Fig. 2. Dorsal bristle of /T. macleodi, n. s. Magn. 350 diam. 



Fig. 3. Superior ventral bristle. Magn. 350 diam. " 



Fig. 4. One of the larger dorsal bristles of //. antilojjes, n. s. Magn. 350 diam. 



Fig. 5. Superior ventral bristle. Magn. 350 diam. 



Fig. 6. One of the stouter forms from the neighbourhood of the spine. Magn. 350 diam. 



Fig. 7. Dorsal bristle of //. haliceeti, n. s. Magn. 350 diam. 



Fig. 8. Superior ventral bristle, viewed antero-posteriorly. Magn. 350 diam. 



Fig. 9. Another superior ventral bristle, seen laterally. Magn. 350 diam. 



Fig. 10. Inferior ventral bristle. Magn. 350 diam. 



Fig. 11. One of the longer dorsal bristles of//, marphysce, n. s. Magn. 350 diam. 



Fig. 12. Superior ventral bristle. Magn. 350 diam. 



Fig. 13. Median ventral bristle, viewed laterally. Magn. 350 diam. 



Fig. 14. Antero-posterior view of a median ventral bristle. Magn. 350 diam. 



Fig. 15. Inferior ventral bristle. Magn. 350 diam. 



Fig. 16. Profile of one of the longer dorsal bristles of H. lunulata, Delle Chiaje. 



Magn. 350 diam. 

 Fig. 17. Antero-posterior view of another dorsal bristle. Magn. 350 diam. 

 Fig. 18. One of the shorter dorsal bristles. Magn. 350 diam. 



