Fig. 32 



Fig. 34 



Qo •• O. -nni> (=^ -• « ^ 

 ■ O o. . 





3 •„ -n . G!3o O .°,'0<,0„.°0„ o 









Fig. 36 



PN O fo 0.6° f 0© 

 



Fig. 37 



0° 



Fig. 38 



Finn 32-37 Typical disintegration ol a sea-urchin egg, which had been 



treated lor some'time with aerated hypertonic sea-water. 

 Fig. 38. — Another type ol "black cytolysis." 



