204 APPENDIX. 



band opens the orifice of the second cavity at the same 

 time that it directs the water into it; and when the 

 cells of that cavity are full, the rest runs off into the 

 cellular structure of the first cavity immediately below, 

 and afterwards into the general cavity. It would ap- 

 pear that camels when accustomed to go journeys, in 

 which they are kept for an unusual number of days 

 without water, acquire the power of dilating the cells 

 so as to make them contain a more than ordinary quan- 

 tity as a supply for their journey ; at least, such is the 

 account given by those who have been in Egypt. 

 When the cud has been chewed, it has to pass along 

 the upper part of the second cavity before it can reach 

 the third. How this is effected without its falling into 

 the cellular portion, could not, from any inspection of 

 dried specimens, be ascertained ; but when the recent 

 stomach is accurately examined, the mode in which this 

 is managed becomes very obvious. At the time that 

 the cud has to pass from the mouth, the muscular band 

 contracts with so much force that it not only opens the 

 orifice of the second cavity, but acting on the mouth of 

 the third brings it forward into the second, by which 

 means the muscular ridges that separate the rows of 

 cells are brought close together, so as to exclude these 

 cavities from the canal though which the cud passes. 



" It appears that the small cavity regarded by Dau- 

 benton as analogous to a reticulum, was not considered 

 by Mr. John Hunter as of sufficient importance to be 

 ranked as a distinct stomach ; and the water-bag must 

 therefore, in his opinion, have held the place of the 

 honey-comb bag in the horned ruminants. And when 



