492 Intestinal Folds and Villi in Vertebrates 



PLATE I. 



The following plate is for the purpose of showing some of the types 

 of folds in the lower vertebrates. 



The folds are shown as they look when viewed from above after the 

 intestine is cut open longitudinally and spread out flat. 



Fig. 1. Folds from turtle. X 5 diameters. 



Fig. 2. Folds from Amphiuma. X 5 diameters. 



Fig. 3. Folds from the salamander Gyrinophilus. X 13 diameters. 



Fig. 4. Folds from a half -grown Necturus. X 5 diameters. 



Fig. 5. Folds from Catostomus. X H diameters. 



Fig. 6. Folds from alligator. X H diameters. 



Fig. 7. Folds from perch. X 10 diameters. 



Fig. 8. Folds from blacksnake. X 5 diameters. 



Fig. 9. Folds from toad. X 13 diameters. 



Fig. 10. Folds from Catostomus. X 24 diameters. 



