504 The Origin and Differentiation of the Lens 
Fic. 61. Experiment DF,. Embryo rana palustris killed 4 days after 
partial extirpation of the right optic vesicle. Section through regenerated 
and normal eyes. Both regenerated eye and its small lens vesicle are sepa- 
rated from the ectoderm by mesenchyme. The normal side shows the early 
“lens” stage. X 90 diameters. 
Fic. 62. Experiment DF,,. Embryo rana palustris killed 4 days after 
partial extirpation of the right optic vesicle. Section through regenerated 
eye and small lens vesicle. Normal eye is similar to the one in Fig. 61. 
x 90 diameters. 
Fic. 63. Experiment DF,,. Embryo rana palustris killed 4 days after 
partial extirpation of the right optic vesicle. Section through regenerated 
eye and small lens vesicle, both are separated from the ectoderm by a layer 
of mesenchyme. Normal eye as in Fig. 61, experiment DF,. XxX 90 
diameters. 
Fic. 64. Experiment DL,. Embryo rana sylvatica killed 3 days after par- 
tial extirpation of the right optic vesicle. Section through regenerated and 
normal eyes. X 45 diameters. 
Fie. 65. Experiment DL,. Section through small lens vesicle of regener- 
ated eye. X 180 diameters. 
Fic. 66. Experiment DL,. Section through normal lens vesicle. X 180 
diameters. 
