PLATE LXXXI. 



Fig. 



1. Bristle with shorter tip in inferior division of the tenth foot of Nereis cultrifera, 



Grube. X Zeiss oc. 2, obj. C. 



1 a. Dorsal bristle of the foregoing. X Zeiss oc. 2, obj. C. 



2. Bristle from the dorsal division (with slender tapering tip) of Nereis Schmarclsei, De 



Quatref. (irorata, Mgrn.). X Zeiss oc. 2, obj. D. 



2 a. Bristle with short tip from same division. X Zeiss oc. 2, obj. D. 



2 b. Bristle with longer tip from ventral division. x Zeiss oc. 2, obj. D. 



2 c. Swimming bristle of the same. X Zeiss oc. 2, obj. D. 



3. Dorsal bristle of Nereis Marionii, And. and Edw. X Zeiss oc. 2, obj. D. 



3 a. Stouter bristle from the lower group of the inferior lobe of the foregoing. X 



Zeiss oc. 2, obj. D. 



4. Dorsal bristle of Nereis Dumerilii, Aud. and Edw. X Zeiss oc. 4, obj. F. 



4 a. Ventral bristle of the same. X Zeiss oc. 4, obj. F. 



4 b. Swimming bristle of epitokous form. X Zeiss oc. 2, obj. C. 



4 c. Ventral bristle (with short tip) of the same epitokons example. X Zeiss oc. 2, 



obj. C. 



5. Dorsal bristle of Nereis diversicolor, 0. F. Mull. X Zeiss oc. 2, obj. C. 



5 a. Upper bristle of the lower ventral tuft of the same. X Zeiss oc. 2, obj. C. 



5 b. Lower bristle of the lower ventral tuft. X Zeiss oc. 4, obj. C. 



6. Dorsal bristle of Eunereis longissima, Johnst., var., from Bay of Tunis. X Zeiss 



oc. 2, obj. D. 



6 a. Falcate bristle from the ventral lobe. X Zeiss oc. 2, obj. D. 



7. Bristles of the dorsal lobe of Nereis (Alitta) virens, Sars; a, entire tip; 7b, articula- 



tion viewed from behind ; 7 c, portion of shaft. X 350. 



8. Superior bristle of the anterior third of Nereis (Nereilepas) fucata, Savigny. X Zeiss 



oc. 2, obj. D. 

 8 a. Upper bristle of the inferior series with short tip. X Zeiss oc. 2, obj. D 



8 b. Falcate bristle of the ventral series of the foregoing, x Zeiss oc. 2, obj. D. 



9. Dorsal bristle of Staurocejphalas rabrovittatus, Grube, from Herm. X Zeiss oc. 2, 



obj. D. 



9 a and 9 b. Ventral bristles with bifid terminal pieces. X Zeiss oc. 2, obj. D. 



10. Bifid dorsal bristle of Staurocephalus Kefersteini, McL, from Lochmaddy. X Zeiss 



oc. 2, obj. F. 



10 a. Simple tapering serrated bristle below the foregoing. X Zeiss oc. 2, obj. F. 



10 b. Falcate compound form with bifid tip (one of medium length from the middle of 



the group). X Zeiss oc. 2, obj. D. 



11. Simple tapering dorsal bristle of Slaurocephalus ciliatus, Keferst., from St. Peter 



Port, Guernsey. X Zeiss oc. 2, obj. F. 



11 a. Bifid bristle (stout). X Zeiss oc. 4, obj. F. 



116. and lib'. Compound bristles from the ventral series, with a tip of medium length. 

 u X Zeiss oc. 4, obj. F. 



