348 MR. J. DALRYMPLE’S DESCRIPTION OF AN INFUSORY ANIMALCULE. 
Fig-. 14. Exhibits the organs of generation. 
A A. Muscles which extrude the penis. 
B. Fasciculus of muscular fibres, which arising from the neck of the sperm- 
bag are inserted on the body of the penis and expel the spermatozoa. 
“ Ejaculatores seminis.” 
C. Preputial sheath, within which is seen a ciliary movement. 
D. Epithelium lining the sperm-bag, seen by gently expressing the sperma- 
tozoa. 
E. Muscles which open the external valve or lateral opening through which 
the penis passes. 
