Van Name. — Simple Ascidians. 
PLATE 53. 
Fig. 53. 
Fig. 54. 
Fig. 55. 
Fig. 56. 
Caesira verrilli, 
Caesira verrilli 
Caesira verrilli 
Caesira verrilli 
sp. nov. Part of branchial sac. X 23. 
sp. nov. Tentacles. X 26. 
sp. nov. Dorsal tubercles. X 26. 
sp. nov. Right gonad. X 17. 
Fig. 57. Caesira verrilli, sp. nov. Diagram showing arrangement of stig- 
mata at summit of fold. 
