PLATE LIU. 



Crossophorus imperator, female. 



Figure 



1. Left valve, seen from side, x 12. 



2. Antennule. 



3. Secondary branch of antenna. 



4. Mandibular foot ; a, one of the masticating spines more highly magnified. 



5. Maxilla of first pair. 



6. „ second pair ;«. J., ungues more highly magnified. 



7. „ third pair. 



8. Apex of vermiform limb. 



9. One of the lateral setse of the same. 



10. Caudal lamina. 



11. Secondary branch of antenna of male. (Copied from Eeport of "Challenger" Ex- 



pedition.) 



Nematohamma olliqua. 



12. Antennule. 



13. Secondary branch of antenna. 



14. Mandibular foot. 



15. Caudal lamina and copulatory organ. 



[754 ] 



