PLATE XXIV * 
Fig. 10. Echinorhynchus salvelini. Profile of ventral margin of proboscis of 
fully mature female. Stained in hematoxylin and mounted in damar. 
Fig.11. Echinorhynchus coregoni. Profile of ventral margin of proboscis of 
fully mature female. Stained in hematoxylin and mounted in damar. 
Fig. 12. EH. salvelini. Outline showing general body-form of fully mature 
female. Body cavity is so packed with embryos that internal structures are 
completely obscured. Whole mount in damar. 
Fig. 13. EH. coregoni. Outline of fully mature female. Note contrast in body- 
form and size of this species and of LZ. salvelini. 
Fig. 14. Neoechinorhynchus emydis. Surface view of proboscis of fully 
mature female from intestine of Graptemys pseudogeographica. Hematoxylin- 
stained specimens in damar,. 
Fig. 15. N. cylindratus. Surface view of proboscis of fully mature female 
from Micropterus salmoides. Whole mount in damar. 
Fig. 16. N. tenellus. Surface view of proboscis of fully mature female from 
Stizostedion vitreum. Stained in hematoxylin and mounted in damar. The hook 
shown in broken outline lies behind the median plane. Terminal hooks in this 
species point more directly backward than in other members of the genus. 
* Seales indicating magnification of Fig. 12 and 13 have a value of 1 mm.; all 
others in the plate have a value of 0.05 mm. 
