ANATOMY OF THE 'iTIREE-TOED SLOTTI. 177 



10. Rapp, v.— "Edentaten," 2. AufL, Tubingen. 1852. 



11. Semon.— Arch. Naturg. 1902, p. 239. 



12. Hunter, John. — " Essays and Observations," edited by 



Richard Owen, London, 1861, vol. ii. pp. 176-179. 



13. Gmelin.— Arch. f. mikr. Anat. 1892, pp. 1-28, Taf. 1. 



14. Mayer, F. J. C.— Froriep's Notizen, 1842, pp. 289-290. 



15. Ballowitz, E.— Anat. Anz. Jena, 1906, pp. 321-324. 



16. Gulliver, G.— Proc. Zool. Soc. 1848, p. 37. 



EXPLANATION OF THE PLATES. 



Plate I. 

 A. The anterior end of a section through the head. 1 1, lips. 

 P. The roof of the mouth : c, cheeks ; v, vestibule ; sp, soft palate. 



C. The bony palate of Bradi/pus tridactylus. 



D. The bony palate of Cholwpus. 



Plate II. 



The external (A) and internal (B) structure of the stomach. In 15 the ventral 

 Willi has heen thrown upwards and to the right, and the dorsal cardiac compartment 

 and pylorus separated and thrown to the left. 

 A, c and B, r.i.i. : paunch. 

 A, d and H,d, c, d, 2 : cardiac stomach. 

 A, eh and B 3 : pylorus. 

 Description of other letters in text. 



Plate III. 



The interior of the dorsal compartment of the cardiac stomach (A), dorsal part of 

 pylorus (B), and ventral part of pylorus (C). 



A a : rod running' through the ruminating gutter to the pylorus, b, rod 



communicating with the paunch (c). d, pleated mucosa. 

 B a : epithelial ridges bounding glandular areas (b). c, ruminating gutter. 



d, hard pleated mucosa continued from the cardiac stomach. 

 C a : pyloric sphincter with beginning of duodenum (b). c, cardiac stomach. 



Plate IV. 



A : The interior of the intestinal tract, a and e, pieces of the small intestines. 



c and d : the lower end of the ileum, colon, and rectum. 

 B : Section through the septum between cardiac stomach and pauuch. 

 (_' : Section of the liver. 



Proc. Zool. Soc— 1921, No. Xll, 12 



