PLATE LXXXIL 



Fig. 



1. Dorsal bristles of Ophryotrocha puerilis. X Zeiss oc. 2, obj. D. 



1 a. Ventral bristle. X Zeiss oc. 2, obj. D. 



2. Dorsal bristle of Lumbriconereis fragilis, 0. F. Mull. X Zeiss oc. 2, obj. D. 



2 a. Winged hook of the fiftieth segment. X Zeiss oc. 2, obj. D., reduced. 



2 b. Hook from the same foot with terminal prolongation of the guard. X Zeiss oc. 2, 



obj. D, reduced. 



3. Dorsal winged bristle of Lumbriconereis Latreillii, Aud. and Edw. X Zeiss oc. 2, 



obj. D. 



3 a. Articulated and winged hook from foot in front of tenth. X Zeiss oc. 2, obj. D, 



reduced. 

 3 b. Articulated and winged anterior hook with shorter terminal piece (behind tenth 

 foot). X Zeiss oc. 2, obj. D., reduced. 



3 c. Posterior hook. x Zeiss oc. 2, obj. D. 



4. Long winged hook from the first foot of Lumbriconereis ivrpatiens, Clap. X Zeiss 



oc. 2, obj. D. 



4 a. Another example from the same foot which shows a tendency to form an articulation. 



X Zeiss oc. 2, obj. D. 

 4b. Stronger dorsal bristle from fifty-seventh foot. X Zeiss oc. 2, obj. D. 



4 c. More slender form from the same foot. X Zeiss oc. 2, obj. D. 

 4d. Hook from the middle of the body. X Zeiss oc. 2, obj. D. 



5. Winged bristle of Lumbriconereis hibernica, Mel. X Zeiss oc. 2, obj. D, draw-tube. 

 ba. Long, winged tapering hook from the tenth foot. X Zeiss oc. 2, obj. F. 



5 b. The same viewed from the front so as to show both wings at the tip. X Zeiss oc. 



2, obj. D. 

 be. Long hook from the thirtieth foot. X Zeiss oc. 2, obj. D. 



5 d. Long hook considerably behind the foregoing. X Zeiss oc. 2, obj. D. 



6. Tenth foot of Lumbriconereis gracilis, Grube, from Lochmaddy. X Zeiss oc. 2, obj. D. 



6 a. Bristles from thirtieth foot of the foregoing. X Zeiss oc. 2, obj. D. 



7. Tenth foot of Lumbriconereis Gr. X 200. 



7 a. Elongated hook from the middle of the body. X Zeiss oc. 2, obj. D. 



8. Dorsal bristle (above spine) of Lumbriconereis (Zygolobus) laurentianus, Grube. X 



Zeiss oc. 2, obj. D. 



8 a. Bristle with bow-like curve below the spine. X Zeiss oc. 2, obj. D. 



8 b. Long winged hook of the twentieth foot seen from the front. x Zeiss oc. 1, obj. D. 

 8 c. Profile of the same. X Zeiss oc. 1, obj. D. 



