Explanation of Plate XVII. 



(Nereis). 



Fig. 1. Dorsal view of the protruded proboscis of Nereis pelagica L. 



10/1. 

 Fig. 2, Ventral view of same. 10/1. 



Fig. 3. Posterior view of IStli parapoiium of the same species. 10/1. 

 Fig. 4. „ „ „ 54th „ „ „ „ 



Fig. 5. Setose bristle of same. 220/1. 

 Fig. 6. Falcate ,, ,, ,, ,, 



Fig. 7. ,, „ „ Nereis Bumerilii Aud. et M.-EdAv. 390/1. 



Fig. 8. Hook from upper side of acicula in the dorsal ramus of 27th 



parapodium of same. 390/1. 

 Fig. 9. Posterior view of parapodium from middle region of the 



body of Nereis Agassizi Ehlers. 22/1. 



Hook from dorsal ramus of same. 320/1. 



Falcate bristle from ventral ramus of same. 390/1. 



Posterior view of 30th parapodium of Nereis kohiensis 



Mcintosh. 31/1. 



Hook from dorsal ramus of the same parapDdium. 320/1. 



Dorsal view of Nereis japonica Izuka. 1/1. 



Thorny bristle of same. 420/1. 



Falcate „ „ „ 390/1, 



„ ,, „ Nereis divericolor O. F. Müller, from coast 



of England. 390/1. 



Arrangement of paragnathi in regions VII and VIII of the 



X^roboscis of Nereis japonica Izuka. 10/1. 



Arrangement of paragnathi in same regions of the proboscis 



of Nereis diversicolor O. F. Müller, from coast of England. 



10/1. 



Fig. 



10. 



Fig. 



11. 



Fig. 



12. 



Fig. 



13. 



Fig. 



14. 



Fig. 



15 



Fig. 



16 



Fig. 



17 



Eig. 



18 



Fig. 



19 



