Figs. 9f 
CasTLE, — Ciona intestinalis, 
Fig. 39. 
Fig. 40. 
Fig. 41. 
Fig. 42. 
Fig. 43. 
Fig. 44. 
PLATE VII. 
Magnification of all Figures, except 48 and 44, 315 diameters; magnification of 
Figs. 43 and 44, about 300 diameters. 
9-42, Four later views of the egg shown in Figs. 35-38, Plate VL ; same 
(ventral) aspect. 
16-cell stage, just formed. This view five minutes later than that in 
Fig. 38. 
16-cell stage, five minutes later. 
16-cell stage, ten minutes later still. Arrows indicate the direction of 
spindles. 
24-cell stage, just formed, some minutes later than the last view. 
A late 24-cell stage, viewed from the right side. 
Optical section of the same egg, near the median plane. The cells of the 
dorsal hemisphere are in mitosis, 
