92 J. M. ESSENBERG. 



PLATE VIII. 



FIG. 37. Portion of transverse section of adult testis showing spermato- 

 genesis. X 410. 



Symbols: 



ppgc Primordial germ cells on periphery of testis. 



sds Spermatids. 



sph Spermatophore. 



sps Spermatozoa. 



ssc Secondary spermatocytes. 



