Explanation of Plate XX. 



(AmUyosylKs, TrypaAiosyllis, SylUs). 



Fig. 1. Dorsal view of AmhlyosylUs speciosa n. sp. 7/1. 



Fig. 2. Dorsal view of anterior extremity of TrypanosylUs misalci- 



ensis Izuka. 20/1. 

 Fig. 3. Posterior view of 78tli parapodiuoi of the same spaeies. 40/1. 

 Fig. 4. Bristle from the same parapodium. 390/1. 

 Fig. 5. Bristle from a parapodium of a sexual bud. 390/1. 

 Fig. 6. Ventral view of posterior extremity of the same species, with 



a cluster of sexual buds. 20/1. 

 Fig. 7. Parapodium of Syllis ramosa Mcintosh. (Parent stock). 



50/1. 

 Fig. 8. Bristle of same. 930/1. 

 Fig. 9. Inferior bristle from parapodium of SylUs inßata Marenz. 



600/1. 

 Fig. 10. Middle bristle from the same parapodium. 600/1. 



