JLCJ-UX J. X J_i I-Li kJ . U^ 



gan forms and have alone been used in this report. The anatomy 

 is dealt with in most of the standard text-books on zoology. 



In the identification of species the following characters (compare 

 figures) should be noted : 



Snakes. 



1. Form of body and general size. 



2. Arrangement of scales on the top, sides and under surface of 

 head (Figs. 21, 22). 



3. Arrangement of scales on dorsal surface of body and the num- 

 ber of rows at various places, i. e., between the head and anus 

 (Fig. 23). 



4. Whether the dorsal scales are smooth or keeled. 



5. Number of large plates on the ventral surface between the 

 head and tail (Fig. 23). 



6. Character of anal plate, i. e., whether single or divided (Fig. 

 23). 



7. Character of scales on the ventral surface of the tail, i. e., 

 whether in a single or double series. 



8. Coloration. 



Turtles. 



1. General size. 



2. Shape of upper (carapace) and lower (plastron) shell. 



3. Surface of shell, i. e., whether covered with horny plates or 

 by a soft skin. 



4. Size of plastron as compared with opening of carapace, also 

 form of the bridge between the plastron and carapace (Figs. 25-27), 

 and whether or not the plastron is divided by a transverse hinge. 



5. Number and arrangement of plates in the different series on 

 carapace and plastron (Figs. 24, 25). 



6. Character of anterior end of upper jaw, i. e., whether notched 

 or projected into beak. 



7. Character of biting and grinding surfaces of jaws, particu- 

 larly as regards width of grinding surfaces. 



8. Extent of web on digits. 



9. Coloration. 



