Art. 9. — M. Yeri and T. Kaburaki : 



List of the species described in this paper. 



Order P0LYCLAD1DA. 



Suborder ACOTYLEA. 



A. Section CUASPEDOMMATA. 



Family Discncelidsc. 



1. Dlscocelis japonica, n. sp. 



Family Slyloeliid:e. 



2. Stylochus rtdilus, n. sp. 



3. ,, ijimai, n. sp. 



4. Bergendalia diver sa, n. sp. 



B. Section SCHEMATOMMATA. 



Family Leptoiriamdre. 



5. Notoplana hum/Mis (Stimpson). 



6. ,, delicata, n. sp. 



7. Hoploplana ornata, n. sp. 



Family Plsmocerida;. 



8. Neoplanocera elongata, n. gen., n. sp. 



9. Planocera reticulata (Stimpson). 



10. ,, purpurea, n. sp. 



11. Paraplanocera misahiensis, n. sp. 



Family lMsiiIosoIenidse. 



12. Pseudostylochus takeshitai, n. gen., n. sp. 



13. ,, fidvus, n. sp. 



14. ,, obscurus (Stimpson). 



15. Callloplana marginata Stimpson. 



Suborder COTYLEA. 

 Family Fseudoceridsr. 



10. Thysanozoon brocchii (Grübe). 



17. Pseudoceros retlculatus, n. sp. 



18. ,, lacteus (Colling wood) ? 



19. ,, hdeomarglnatus, n. sp. 



20. ,, nigromarginatus, n. sp. 



