322 



GENERAL BIOLOGY 



The eggs and sperms of some of the lower organisms may 

 be mixed in a glass of sea water and watched at one sitting 



Fig. 182. Nest and eggs of the musk turtle {Eremochelys odorams). 

 This nest was made in an old muskrat house. Tiie full complement of 

 eggs is shown below. Photos by Hankinson and McDonald, 



through fertilization and the early stages of development, 

 until they are ready to enter actively into the struggle for 



