CASTLE. 
Ciona intestinalis. 
PLATE IX. 
Surface views of preparations; magnification, 400 diameters. 
24-cell stage, ventral view. 
The same egg, in the same stage, dorsal view (cf. Plate VIL Figs. 43 
and 44). 
32-cell stage, ventral view. 
The same egg and stage, dorsal view. 
46-cell stage, ventral view. 
'The same egg and stage, dorsal view. 
