AGGLUTINATION OF SPERMATOZOA. 



TABLE IV. 



281 



HETERO-AGGLUTINATION OF SPERMATOZOA OF CERTAIN MARINE ANIMALS 



(PACIFIC GROVE, CALIF.). 



The letters used refer to types of hetero-agglutination (A) to strand forma- 

 tion ; (5) to pinwheel formation; and (C) to clumping. The latter may be 

 considered as aggregation rather than as a type of hetero-agglutination. See 

 text. 



In these the spermatozoa are so oriented that the center consists 

 of a nucleus of sperm heads with tails radiating outward, and the 

 periphery is composed of a dense zone of sperm heads with tails 

 radiating inward. 



