Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
CasTLe. — Rhynchobdellide. 
33. 
36. 
37. 
38. 
PLATE 8&8. 
G. parasitica, var. plana. Dorsal view of head end of an individual from 
Hayana, Illinois, in which the division between rings 2 and 3 was not 
evident. Stippling shows position of yellow pigment in a median vitta 
and (on left side) in metameric marginal spots. From an alcoholic 
specimen. X 41. 
G. parasitica, var. rugosa. Dorsal view of head end of an individual from 
Cambridge, Mass., showing the usual annulation of somites 1.-111. From 
an alcoholic specimen. Enlarged. 
G. stagnalis. Dorsal view of posterior end of body. Enlarged. 
G. heteroclita. Dorsal view of head end of a living animal, showing most 
common position of eyes. Enlarged. 
A dorsal view of the head end of the individual represented in Figure 
88. The anterior ring of somite vI. is seen to contain traces of a trans- 
verse pigment line. Drawn from the living animal. Enlarged. 
G. parasitica, var. plana. Dorsal view of posterior end of body of the 
individual shown in Figure 32. Marginal light spots indicated by 
stippling. 24. 
G. heteroclita. Dorsal view of a living animal, showing the general form 
of the body at rest, and the color pattern sometimes present on the 
dorsal- surface. The rings are not indicated, but the numerals are 
placed opposite and serve to designate those rings in which the 
pigment is found (the anterior rings of their respective somites). 
Enlarged. 
Sika eee 
