PLATE IS. 



FiRs. 1-4. Slr(i|ilic)inonia o|ihiiliana X 24. Fiss. .5-12, S. Iriangiilaris. X 5.5. Fig. 13. S. 

 farciinen. X 00. 



Fig. 1. Cros.'; section of S. ophidiana along line D of fig. 5, pi. S. 



Figs. 2, 3, 4 of same species are along lines, E, F, G, fig. 1, pi. 9. 



Figs. 8, 12, 10, 11 of S. triangularis correspond to lines D, E, F, G, fng. 3, pi. 9. 



Figs. 5, 6, 9 correspond to lines A, L5, C, iig. 6, pi. 36. 



Fig. 7. Section through mid gut behind phar3'nx. 



Fig. 13. Section through mi<l gut of S. farcimen in region of salivary glands. 



