EEOENT EESEAKOHES ON SPERMATOGENESIS. 



327 



Pig. 2.— Spermatogenesis of the rat. a. Seminiferous cell of llensou (sper- 

 matosjjore, Blomfield). b. Multiuuclear cyst of Rcnson (sperm -polyplast, 

 Blomficld), resulting from the growth and division of the nucleus of a. 

 c. Fragments of the "cellules de soutien" of llenson (blastophoral cell of 

 Blomfield) as seen in a teased preparation, d. First phase of the sup- 

 posed penetration (lienson) of the nematoblasls (young spormatozoids) 

 into the " cellule de soutien " (blastophoral cell), k. Later phase of tiio 

 same. f. to J. Development of a spermatoblast (neniatoblast, llcnson) 

 into young spermatozooid, occurring, according to Benson, before its 

 connection with the "cellule de soutien" or blastophoral cell. 



