542 _ Prof. E. A. Minchin. Report on the [Aug. 17, 

turned over to the left side, and the Male Genitalia zn situ in the Abdomen. 
S. St., sucking stomach; 1—13, the limbs of the intestine, as indicated in the two 
previous figures; JM/.7., M.t., Malpighian tubules; #., rectum; 7. gl., rectal glands ; 
An., anus; 7", testis; ¢. f., testicular filament; V.d., vas deferens; v. s., v. s., vesicule 
seminales, that on the left in its natural coil, that on the right unravelled ; D. ¢7., ductus 
ejaculatorius ; Pyg., hypopygium ; v. az. n., branches of the ventral azygos nerve (genital 
nerve) ; p. 2., nerve to penis, following the ductus ejaculatorius. 
The ductus ejaculatorius (D. ¢.) has at its commencement a slight dilatation, 
into which open the four tubes just described. From this point the ductus 
runs a very short way backwards, then curves sharply forwards, but soon 
turns back again, passes across to the left side side of the body, and forms a 
loop round the rectum, coming forward on the right to pass into the penis. 
The various parts of the male generative organs are innervated, as already 
described, by a nerve plexus formed from the azygos abdominal nerve. 
There appears‘ to be a small ganglionic swelling on the ductus ejaculatorius, 
whence arises a nerve (p. 7.) which follows the ductus in its course to the 
penis. 
The external organs of generation are concealed beneath the hypopygium. 
The penis is an organ of complicated structure and mechanism, with an 
