Divisions of Small Intestine 194       Structure of Small Intestine 194       1. Secretory Apparatus 194       2. Absorbing Apparatus 195       Valvulæ Conniventes 196     II. Endgut or Large Intestine 198   II. Serial Review of the Ileo-colic Junction and Connected Structures in Vertebrates 200     I. Fishes 200     II. Amphibia 201     III.  Reptilia 201     IV. Birds 203     V. Mammalia 204         Monotremata 204         Marsupalia 204         Edentata 206         Sirenia 208         Cetacea 209         Ungulata 209         Rodentia 211         Carnivora 212         Cheiroptera 212         Insectivora 213         Primates 213   III.  Phylogeny of the Types of Ileo-colic Junction and Cæcum in the Vertebrate Series 217     1. Symmetrical Form of Ileo-colic Junction; Mid- and End-gut in Direct Linear Continuity 221     2. Asymmetrical Development of a Single Cæcal Pouch, lateral to the Ileo-colic Junction, Mid- and End-gut Preserving their Linear Continuity 223     3. Rectangular Ileo-colic Junction, with Direct Linear Continuity of Cæcum and Colon 225   IV. Structure of Cæcal Apparatus and Specialized Morphological Characters of Colon in Rodents and Ungulates 229     1. Cæcum Proper public@vhost@g@gutenberg@html@files@43350@[email protected]#Page_229"