The Irish Naturalist. 
August, 
If the body of the worm is squeezed under a cover-glass, these 
cells may be seen breaking awa}^ from the wall of the intestine. 
The 7iephridia are oval-shaped bodies flattened from side to 
side. They consist of three parts — a small anteseptal part con- 
stituting the funnel (Fig. 5, a) ; a flat, oval post-septal part ; and 
a thick duct {d), about equal in length to the post-septal part. 
The duct arises from the hinder end of the post seplal, and 
opens to the exterior in front of the ventral setae. The 
lumen of the nephridium is convoluted, but does not 
Fig. 5. Nephridium.— iz, funnel ; b, septum ; c, ciliated regions ; d, duct. 
Fig. 6. Spermathecae. — A, Fully mature; a, oesophagus ; ^, duct com- 
municating with oesophagus ; c, ampulla full of sperm ; duct covered 
with glands. 
B, Immature spermatheca. 
Fig. 7. Sperm funnel— sperm ; h, sperm duct ; r, lip of funnel. 
