OCR Text |
Show 22 MR. A. H. GARROD ON T H E [Jan. 4, lated caecum at about an inch from its open extremity, and its relations to it are not in any way peculiar. The sacculated caecum is nearly two feet long, and is traversed by four longitudinal bands. At its open end, which is an inch beyond (that is, further from the caecal extremity than) the ileo-caecal valve, it is constricted by a circular sphincter muscle, which forms the orifice of communication with the rest of the cylindrical large intestine. The colic surface of this sphincter is situated in the side of the colon, three inches from the blind extremity of a true, simple, thick-walled, slightly pyriform Fig. 2. Diagram of the convolutions of the colon in the Capybara. The dotted line represents the ccecum springing from the side of the dilated end of the large intestine, and running forward to the diaphragm, a, ileo-crocal valve ; b, rectum. caecum, which is directly continuous with the colon, and is indistinguishable from it in structure. This second caecum is, as indicated above, three inches from the extreme end to the centre of the orifice by which it communicates with the sacculated one. Superficially its |