RENAL ORGANS OF CERTAIN DECAPOD CRUSTACEA. 291 



Fig. 5.— Horizontal section through the bladder and " green gland " of 

 Pandalus annulicornis in the Mysis stage. 



Fig. 6. — Transverse section through the kidney of Pandalus annuli- 

 cornis, just after the final metamorphosis. 



Fig. 7. — Section through the end-sac and associated wall of the bladder 

 in an adult Pandalus. The letters Bl. lie in the cavity of the bladder. 



Fig. 8. — Horizontal section through the kidney of a young Crangon vul- 

 garis, just after the final metamorphosis. 



Fig. 9. — Diagram of the excretory system of Palsemon. 



Fig. 10. — Diagram of the excretory system of Pandalus. 



