PLATE XX. 



Nyctiphanes australis, G. 0. Sars. 



Fio-. 1. Ovio-erous female, from left aide ; magnified about eight times. 



Fio-. 2. Anterior division of body, together with first caudal segment of same, viewed 

 from the ventral face, to show the form of the double ovisac. 



Fio-. 3. Anterior part of body, from above. 



Fig. 4. Right antennular peduncle, from above. 



Fio-. 5. Same, from inner side. 



Fig. 6. Basal joint of same, from outer side. 



Fio-. 7. Rio-ht antenna, with scale and proximal part of flagellum, from below. 



Fig. 8. Anterior lip. 



Fio-. 9. Posterior lip. 



Fig. 10. Mandible, with palp. 



Fig. 11. Cutting edges of mandibles. 



Fig. 12. Maxilla of first pair. 



Fig. 13. Maxilla of second pair. 



Fig. 14. MaxUHped. 



Fig. 14a. Terminal joint of same ; more highly magnified. . 



Fig. 15. Leg of first pair, with gill and luminous organ. 



Fig. 15«. Terminal joint of same ; more highly magnified. 



Fig. 16. Leg of second pair, with attached gill. 



Fig. 17. Leg of fifth pair, with gill (exopod wanting). 



Fig. 18. Leg of penultimate pair-, with giU and luminous organ (exopod wanting). 



Fig. 19. Gill of last pair, with rudiment of leg. 



Fig. 20. Rudimentaiy leg of last pair, isolated, and more highly magnified. 



Fig. 21. A pleopod. 



Fig. 22. Extremity of tad, with caudal fan, from above. 



Fig. 23. Tip of telson ; more highly magnified. 



