1902.] NATURAL SCIENCES OF PHILADELPHIA. 249 



same diameter throughout its whole extent. Villi are present and 

 there is an ileo crecal valve. A tapeworm was foimd in the small 

 intestine, but in such a disorganized condition as not to admit of 

 identification. The caecum is long and capacious and puckered up, 

 the muscular fibres being gathered together into three well-marked 

 wide bands. A long and capacious csecum is found as Avell known 

 in lemurs, and though less well developed in certain insectivores 

 as Macft'oscelides and Rhyncocyon. A caecum is also present in some 

 species of Tupaia and absent in others. While usually absent in 

 Chiroptera, it is nevertheless found in a rudimentary condition in 

 certain species of lihinoj^oma and Megaderma. The Cieciuu of 

 Galeopithecus agrees with that of the lemur more than with that of 

 either lusectivora or Chiroptera in being constricted into pockets or 

 cells. The large intestine, larger than the small one as obtains in 

 certain Herbivora, may be divided somewhat arbitrarily into three 

 parts, distinguished by the disposition of the muscular fibres and 

 the character of the mucous membrane, the first part consisting of 

 about one-seventh, the second of two-sevenths, and the third part 

 of four-sevenths of the entire length of the gut. Peyer's patches 

 are foimd throughout the long intestine, as is also the case in Eden- 

 tata, Rodentia and Insectivora. The length of the alimentary 

 canal (including the oesophagus) and parts of the same appear to 

 vary considerably as shown by the following resume, the difference 

 being due possibly to the age of the animal examined : 



' Lechers Borneo Sumatra Owen'* 



specimen. specimen. specimen, specimen. 



mm. in. mm. in. mm. in. mm. in. 



Length of animal 400 = 16 375 = 15 350 = U 400 = 16 



Length of stomach 58 = 2.3 100 = 4 75 = 3 



S. int 450 = 18 650 = 26 550 = 22 1,300 = 52 



L.int 470 = 18.8 1,000=40 800 = 32 2,275 = 91 



Csecum 74 = 2.8 225 = 9 175 = 7 25 = 1 



Ratio of length of animal to 



length of alimentary canal . 1 to 2.9 1 to 5.5 1 to 4.8 1 to 9.2 



According to Cuvier," the length of the alimentary canal is 

 about three times the length of the animal. This estimate agrees 

 more closely with the results obtained by Leche and the author^than 

 those of Huxley,^* who states that the alimentary canal is six 



1^ Op. cit, p. 63. 



^'^Anat. of Vertebrates, 1868, Vol. Ill, p. 430. 



" Anatomie Comparee, 2cl Ed., 1835, Tome 4, 2d Partie, p. 185. 



1* Anatoimj of Vertebrated Animals, 1872, p. 383. 



