6 Jackson's Dissection of 



which arose from the left extremity of the cavity, ran paral- 

 lel along the large cmvature and were gradually lost ; they 

 were also intersected by very numerous, short, but not con- 

 tinuous septa Avhich formed the cells. This cavity, Hke the 

 first, was lined by cutis, without papillae ; cuticle not raised. 

 Muscular coat about two lines thick ; fibres mostly longi- 

 tudinal, thouorh some were transverse : the same structure 

 was also seen about the cells and in the septa. 



The third cavity, or true organ of digestion, was for the 

 most part thin and membranous, of an elongated form, but 

 somewhat incurvated, and measured three and a half feet in 

 length. Being cut open, it measured three inches across 

 at the left extremity, fourteen inches at the largest part or 

 about the junction of the first and second thirds, eight inches 

 where it became contracted, or at the distance of six inches 

 from the pylorus, after which it dilated to twelve inches, and 

 then contracted again at the pylorus to four and a half inch- 

 es. This cavity at the left extremity Vv^as of about an uni- 

 form size throughout the first five inches, but there was not 

 the slightest appearance of a separate cavity as generally 

 described, and as is strongly represented by Home in the 

 Bactrian camel ; otherwise, the form of this third cavity 

 corresponded perfectly with his figure (pi. 24.) He re- 

 marks upon the intermediate cavity as so small that it might 

 be overlooked were it not for the distinctness of its orifices ; 

 but this last was not found in either of the individuals under 

 description. He remarks, also, upon the absence of septa and 

 of the cuticle which generally characterize the third cavity 

 of ruminants, and which absence, in the present case, seemed 

 to be a strong additional reason for denying the existence of 

 an intermediate cavity. The mucous membrane general- 

 ly, was smooth, soft, extremely thin, and thrown into loose 

 longitudinal folds, of which there were counted about forty, 

 commencing towards the left extremity, where the dilata- 

 tion began, and terminating within six inches of the py- 

 lorus ; in it were some small mucous follicles. Upon the 

 inner surface of that portion of the left extremity which 

 is generally described as an additional cavity were seen the 



