1882.] PROF. ST.-GEORGE MIVART ON THE .ELUROIDEA. 509 



A large Peyer's patch extends down to the iho-csecal valve ; and 

 there are glands at the caecnm's apex. In a dried specimen I find 

 the caecum with a rounded dilatation at its end ; but this is pro- 

 bably an artificial distortion. 



In Hemigalea I found the caecum to be of about the same size as 

 in the Genet, but with strong ineffaceable internal folds, which 

 meet at the apex around a small glandular rosette of about six 

 glands, each gland being about the size of a pin's head. 



In Galidia the caecum is long, rather slender, and exceedingly 

 pointed towards its apex. In Cynictis it is very long (compared 

 with the other iEluroids), rather slender, and a little curved. 



In Arctictis the caecum all but or quite aborts'. The large 

 and small intestines run on as one longitudinal tube, of equal 

 calibre, independently of it, with long and strong internal longi- 

 tudinal folds, which are not interrupted at the place where the 

 minute, quite rudimentary caecum is given oflF. There is no trace of 

 a transverse constriction or valvular structure between the small and 

 the large intestine. In Nandinia, on the contrary, though there is 

 no external indication of a caecum, or change in the gut's diameter, 

 there is a distinct interruption in the internal structure of the 

 alimentary tube at the junction of the small and large intestines. 

 There is, in the first place, a transverse valvular fold. On the small- 

 intestine side of this fold there is a large continuous Peyer's patch, 

 while on the ether side of it longitudinal ridges begin to appear. 

 These ridges, however, are not nearly so strongly marked as they are 

 in Aictictis. 



In Profeles the caecum is short, thick, and rounded ". 



In Hycena the caecum is long, simple, and rather pointed. It is 

 about 8 inches long. In Crocuta^ it is 6 inches long. 



Cuvier ^ gives the proportion in the Hyaenas of the circumference 

 of the small intestine to its length as 1 to 110, and of the large as 1 

 to 6. He also says^ that the small intestine increases in diameter 

 from the pylorus to the ctecum, and that its walls are so thin as to 

 be almost transparent, though those of the Carnivora are generally 

 more or less thick. 



Meckel*^ says that the proportions borne by the small intestine to 

 the large intestine, are in the Cat from 5 to 1 to 6 to 1, in the 

 Genet as 8 to 1, in the Civet as 10 to 1, in the Zibeth as 15 to I, and 

 in the Hyaena as 5 (or 7) to 1. 



According to Hunter ('Essays and Observations,' vol. ii. p. 56), 

 the small intestine hi the Suricate is "something more than the 

 whole length of the body of the animal," while the large intestine 

 "is more than half that length." 



o" 



1 P. Z. S. 1878, p. 142. On tbe other hand, the caecum may be half an inch 

 long : see Journal of Asiatic Soc. of Bengal, vol. xv. p. 193. 



2 P. Z. S. 1869, p. 474. 8 P. Z. S. 1879, p. 84, fig. 2. 

 ■* Le9ons d'Anat. Comp. vol. iv. P partie, p. 211. 



' L. c. p. 236. " Anat. Comp. vol. viii. p. 703. 



