PLATE IV. 



Pseudalibrotus Nanseni, G. 0. Sars. 



Fig. 1. Adult male, viewed from left side. 



— 2. Cephalon of female, with antennae, lateral view. 



— 3. Superior antenna of male. 



— 4. Inferior antenna of same. 



— 5. Part of flagellum more highly magnified, showing the arrange- 



ment of the calceolfe. 



— 6. A calceola highly magnified, lateral view. 



— 7. Same, front view. 



— 8. Posterior lip. 



— 9. Left mandible with palp, viewed from inner face. 



— 10. Same, without the palp, lateral view. 



— 11. Anterior maxilla. 



— 12. Posterior maxilla. 



— 13. Maxillipeds. 



— 14. Anterior gnathopod. 



