Curtis.— Planaria. 
PLATE 10. 
(All the figures are again from living specimens drawn increased 20 diame¬ 
ters but are reduced two thirds in the reproduction.) 
Fig. 19. A head piece of P. maculata a few hours after normal fission, show¬ 
ing the cut expanded as it is when the animal moves about. The gut 
is shown only in the region of the pharynx. 
Figs. 20, 21. The same specimen as is shown in figure 2-7 redivided on the 
eighth day after the condition shown in figure 2. 
Fig. 22. A normally proportioned P. maculata just before normal fission. 
Fig. 23. A specimen to show bizarre branching of the gut. 
Fig. 26. The posterior end of figure 19 as it appears contracted when the 
animal is at rest. 
Fig. 27. The posterior end of a head piece on the day after normal fission. 
Fig. 28. The posterior end of the same specimen as shown in figure 19 on the 
second day after the fission. 
Fig. 29. The same on the 4th day. 
