490 A. W. BELLAMY 
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60 
59 
Figs. 52 to 60 Differential inhibition. 52, 53, outline views of same embryo 
shown in figures 1, 2, 16 1/2 hours later. 54, 55, dorsal views of two embryos and, 
56 to 60, lateral views of five embryos after treatment in m/5 LiCl. Eggs late 
cleavage when placed in the solution. Treatments: 54, 55, 53 hours in LiCl. 
56 to 60, 53 1/2 hours in LiCl + 10 days in water. Exp. IV 59. 6b, open brain 
region; v.s., ventral sucker; y.p., yolk plug. 
