ON THE CCUM OF CANIS CANORIVORUS. 223 
33. NOTE ON THE CCUM OF CANIS CANCRL 
VORUS* 
Tue South-American Canes present peculiarities which have always Page 748. 
made it difficult to determine their exact relation to the other members 
of the family. This difficulty is somewhat increased by the determi- 
nation of the peculiarities of their visceral anatomy; for on eviscerat- 
ing a specimen of Canis cancrivorus I found that the cecum differs 
from that of other members of the genus. Whether the observed 
peculiarity holds in other closely allied species, and in other individuals 
of the same, can only be determined by the dissection of other speci- 
mens as they come to hand. 
On the authority of Professors Owen and Flower, and of the late 
Mr. H. N. Turner, the cecum of all the Canide is uniformly cylindri- 
cal and peculiar in being folded on itself twice or three times in a 
serpentiform manner (Fig. B). On looking at the distended cecum 
of the common Dog, with the distal or colic end downwards, the caput 
upwards, and the appendix itself towards the observer, it is seen to 
spring from the junction of the small and large intestines with an 
~ abrupt turn to the left, which is followed very shortly by an equally 
sudden turn to the right, causing it to stand transversely to the direc- 
tion of the intestine ; a third bend to the left, above the others, leads 
A. Cxeum of Canis famelicus. 
B. Cxeum of Canis familiaris. ‘all one half natural size. 
C. Cxeum of Canis cancrivorus. 
* “Proceedings of the Zoological Society,” 1873, pp. 748-9. Read, November 
18, 1873. 
