PLATE XXXIV. 



Figs. 1-6. Ascidia pyriformis, Hirdman. 

 Figs. 7-10. Ciona flemingi, Herdman. 



Fig. 1. Ascidia pyriformis, from the right side ; natural size. 



Fig. 2. The same specimen from the left side ; natural size. 



Fig. 3. Another specimen with the test removed, seen from the right side, showing the 



shape of the body, the siphons, &c. ; natural size. 

 Fig. 4. Part of the branchial sac of Ascidia pyriformis, seen from the inside ; magnified 



(Hartn., obj. 4). 

 Fig. 5. The dorsal tubercle of the same species ; magnified (Hartn., obj. 4). 

 Fig. 6. Part of the dorsal lamina of Ascidia pyriformis ; magnified (Hartn., obj. 4). 

 Fig. 7. Ciona flemingi, from the right side ; natural size. 

 Fig. 8. Part of the branchial sac of Ciona flemingi, seen from the inside ; magnified 



(Hartn., obj. 4). 

 Fig. 9. Part of the series of dorsal languets of the same species ; magnified (Hartn., obj. 4). 

 Fig. 10. The dorsal tubercle of the same species: slightly enlarged. 



