Fig. 
Fig. 
Fig. 
Fig 
CasTLe. — Rhynchobdellide. 
3a. 
. 3). G. parasitica. Ventral view of anterior part of a small individual obtained 
PACs 
G. stagnalis. Entire digestive tract shown; somite limits indicated by 
transverse lines, rings not represented. From an entire preparation. 
x about 16. 
G. parasitica. Parasagittal section of head end of a small individual taken 
from a turtle (probably Chelopus insculptus Le Conte) bought in a 
Philadelphia market. Only one (the largest) of the three closely asso- 
ciated pairs of eyes appear in the section. 
G. stagnalis. Ventral view of head end, showing mouth, oral sucker, and 
the marginal sensille and annulation of somites 1.-v1. From an entire 
preparation. X 83. 
G. parasitica. Dorsal view of brain. 
from the same source as that shown in Figure 2. From an entire 
preparation. 
