The Morphology of Bull Spermatozoa

Abstract

The microscopical features of living and dead bull spermatozoa are described. The findings are discussed in. relation to previous observations on the structure of the head of the bull spermatozoon. The cytoplasmic cap of the living cell possesses a characteristic structure which is identical with that which has been ascribed to the acrosome. The altered structure of the cap of the dead spermatozoon is identical with that previously described as characteristic of a second cap-like structure, the galea capitis. It is concluded that the terms galea capitis and acrosome have been used to describe the same structure. It is suggested that the cytoplasmic cap of the bull spermatozoon should be called the acrosome.