PLATE VIII. 



PAGE 



Diastylis stygia, G. 0. Sars ; adult male, . . 50 



(Anatomy.) 



Fig. 1. Anterior part of body, after the carapace has been removed, from above, 

 exhibiting the whole branchial apparatus in situ, fr, frontal part ; 

 0, ocular lobe ; a\ antennula ; a 2 , antenna ; ex, exopodite of maxilli- 

 ped; exp, terminal lamella of same; ep, epipodite of maxilliped; 

 br, gill. 



Fig. 2. Eight antennula ; more highly magnified. 



Fig. 3. Right antenna, with proximal part of flagellum, seen from below. 



Fig. 4. Part of flagellum ; more highly magnified. 



Fig. 5. Part of the ventral nervous cord, comprising the seven ganglia belonging 

 to the trunk and the three anterior caudal ganglia. 



Fig. 6. Gill isolated, seen from inner side. 



Fig. 7. Part of the gill, with three gill-lamellse ; more highly magnified. 



Fig. 8. Leg of first pair. 



Fig. 9. Leg of second pair. 



Fig. 10. Leg of third pair. 



Fig. 11. Leg of fourth pair. 



Fig. 12. Leg of fifth pair. 



Fig. 13. Anterior pair of pleopoda. 



Fig. 13a. Outer part of a pleopod of first pair. 



Fig. 14. Pleopod of second pair. 



Fig. 15. Extremity of tail, together with telson and right uropod, from above. 



