Abstract
Differentiation of the spermatids ofMus molossinus TemmincketSchlegel has been described from a study of electron microscopy of thin sections of testis. The head cap and acrosome develop from the Golgi complex. The development of the caudal sheath from the outer layer of the nuclear membrane takes place in the same manner as in albino rat spermatogenesis.
The caudal sheath has played a role in separating mitochondria during the formation of the tail axial fibrils.
During maturation of the spermatid the karyoplasm undergoes striking physicochemical alterations. Both fine dense chromocenters and less dense coiled filaments at random dispersed in the karyoplasm are replaced by dense coiled filaments arranged parallel along the longitudinal axis of the spermatid nucleus.
