EXPLANATION OF PLATE XXXII. 
Fic. 20.—Notoscolex gravelyi; penial seta. a, slightly magnified, 
to show the general form; 6, highly magnified, the 
distal end only. 
21.—Megascolex cingulatus; spermatheca. a, the whole 
spermatheca, the dotted lines showing the course of 
the duct behind the ampulla; 5, diverticulum only, 
from another organ, showing a different condition of 
the secondary diverticula, rather more highly magni- 
fied. 
22.—Megascolex insigmis; spermatheca. 
23.—Megascolex pentagonalis; male genital area. o@ points 
to position of male aperture. 
24.—The same; spermatheca. 
25.—Megascolex trivandranus; male genital area. 
26.-—The same; spermatheca. 
27.—Pheretima trivandrana; prostate. 
