Fig. 1. 
6 
Fig. 2. 
Figs. 1—4. Äphanostoma pulchella. 
Fig. 1. Transverse section through the pha- 
rynx (ph) ; fd, ingested food; fg^ frontal gland; 
g, slime gland; int, integument; o, ova; t, 
testes. 
Fig. 2. Transverse section through the copu- 
latory organ (p); ge, genital glands; par, 
parenchyma; sp, spermatozoa. 
Fig. 3. Transverse section through the midale 
of the body: p, vacnolated parenchyma. 
Fig. 4. Median longitudinal section showing 
the relative positions of the genital ope- 
nings: bs, bursa seminalis; m, mouth. All 
of these drawings were made with a camera 
lucida, X 250 diam 
Fig. 3. 
tg t o' p 
Fig. 4. 
