LIST OF WOOD-CUTS. 



Figure 1. Blood corpuscles of Hammerhead Shark (Zygcena malleus) in their normal condi- 

 tion. Magnified 210 diameters ...... 



Figure 2. The same treated with a drop of acetic acid, showing the different stages of its 

 action. 210 diameters ........ 



Figure 3. Blood corpuscles of Salt-water Terrapin in their normal condition. 210 diameters 

 Figure 4. The same acted on by acetic acid. 210 diameters . . . . 



Figure 5. Blood corpuscles of a Yellow-bellied Terrapin (Emys serrata), kept without food 



or water for several weeks, then placed in water and abundantly supplied with 



vegetable food, and finally placed in carbonic acid gas. 210 diameters 



Figure G. Blood corpuscles of a Yellow-bellied Terrapin (Emys serrata), which had been 



destroyed in hydrogen gas. 210 diameters .... 



Figure 7. Blood corpuscles of Terrapins which had been deprived of air by a ligature rouuc 

 their necks. 210 diameters ...... 



Figure S. Viscera of Snapping Turtle ( Chelonura serpentina). One-half diameter . 

 Figure 9. Viscera of Gopher (Tesludo polypliemns). One-half diameter 

 Figure 10. Rudimentary pancreas of the Plaice (Platessa oblonga). One-half diameter 

 Figure 11. Viscera of Fresh-water Gar (Lepisosteus). One-half diameter 

 Figure 12. Position of stomach, spleen, and intestine of Stingray (Tryyon sabina), after re 

 moval of liver. One-half diameter ..... 



Figure 13. Stomach and spleen of the same, turned over to one side and exposing the pancreas 

 One-half diameter ....... 



Figure 14. Stomach, spleen, and pancreas of Menobranchus maculatus. One-half diameter 

 Figure 15. Spleen and pancreas of Water Snake (Tropidonotus sipedon) 

 Figure 16. Pancreas of Soft Shelled Turtle (Trionyx ferox). One-half diameter 

 Figure 17. Pancreas of Yellow-bellied Terrapin (Emys serrata). One-half diameter 

 Figure 18. Pancreas of Gopher. (Testudo polyphemus). One-half diameter 

 Figure 19. Viscera and impregnated uterus of Stingray (Tryyon sabina). One-half diameter 

 Figure 20. Viscera of Congo Suake (Amphiuma means). One-half diameter 

 Figure 21. Viscera of Black Snake (Coluber constrictor). One half diameter 

 Figure 22. Stomach, spleen, and pancreas of the Hammerhead Shark (Zygmna malleus). One 

 half diameter ........ 



Figure 23. Stomach, spleen, and pancreas of Congo Snake (Amphiuma means). One-half 

 diameter . . ... 



31 



31 

 32 

 32 



35 



3G 

 90 

 91 

 93 

 99 



100 



100 

 101 

 102 

 102 

 103 

 103 

 110 

 111 

 112 



110 



116 



