PLATE XL 



FigB. 1-6. Abyssascidia vasculosa, n. sp. 

 Figs. 7-13. Ascidia sp. (Dorsal tubercle, &c.). 

 Figs. 14-16. Styela sericata, n. .sp. 



Fig. 10. 



Fig. 11. 

 Fig. 12. 

 Fig. 13. 



Fig. 14. 

 Fig. 15. 

 Fig. 16. 



Abyssascidia vasculosa ; natural size. 



Body of same with test removed, from left side ; natural size. 



Dorsal tubercle, tentacles, &c., of same ; magnified (S. 1). 



Part of branchial sac of same, from inside ; magnified {S. 1 ). 



Part of dorsal lamina of same ; magnified (S. 1). 



Alimentary canal and reproductive organs of same ; natural size. 



The dorsal tubercle and neighbouring parts of a large Ascidia from Kerguelen 

 Island ; natural size. 



The same parts seen in longitudinal vertical section ; natural size. 



An antero-posterior section of the dorsal tubercle; magnified (S. 1). 



Small part of last ; highly magnified, to show the ciliated infundibula, 

 glandular tubule, connective tissue with blood sinuses, &c. (S. ^). 



The csecal end of one of the glandular tubules ; highly magnified (S. ^). 



Transverse section of a tulntle filled with cells ; highly magnified (S. ^). 



Small jjart of the braurhial sac of the .same specimen oi Ascidia ; magnified 

 (S. 1). 



Styela sericata ; natural size. 



Part of the branchial sac and dorsal lamina of the same ; magnified (S. 1). 



The large and small tentacles of the same ; magnified (S. 1). 



