3o2 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
these sacs in all the males successfully sectioned was not ripe, 
whereas that in the receptaoulum of the female was always shaped 
like mature sperm. 
Eig. C. 
On each side of this central mass of seminal vesicles lies a testis 
an exceedingly large body proportionately, which lies with and 
