Digestive System Special. 87 



epithelial lining of the gullet terminates abruptly at the Cardiac 

 orifice. 



In the Proloscidia, where however the stomach is longer than 

 usual, with the Cardiac sac much produced and conical. 



In most Perissodactyla. 



In the Hyracoidea, in which two-thirds of the cavity are lined 

 with a thick white epithelium; and the stomach is bent upon itself 

 where this lining ceases. 



In nearly all Dasypodidae, and some Myrmecophagidre of the In- 

 Bnamellate Order, where the muscular coat is more or less thin at 

 the Cardiac end, and thick, with a tendinous spot externally, at the 

 Pyloric end : especially in Manis, in which the structure is made 

 the more gizzard-like by its thick papillose cuticular lining. 



In all Marsupialia^ whether flesh-, insect-, or leaf-eaters, except 

 the Macropidae. 



And in the Mbnotremata ; in Ornithorhyncus the stomach is mem- 

 branous, and chiefly remarkable for the close approximation of the 

 Cardiac and Pyloric oriflces : in Echidna the tunics of the stomach 

 are thin to near the Pylorus, where the muscular coat assumes 

 something of the gizzard character. 



(h) is simple, lut with glandular patches, in 



The insectivorous BatSy in which the gastric membrane at the 

 Pyloric end of the stomach assumes a glandular character. 



The Castoridae among the Rodentia, where the gastric glands are 

 situated near the Cardiac orifice, arranged in longitudinal rows. 



And the Phascolomydoe of the Marsupialia, where the conglomerate 

 gastric gland is of a flattened ovate form, near the Cardiac orifice, 

 and with its excretory orifices scattered. 



(c) is CoxsTEiCTED iuto two Of three portions, e.g. 



In the Phyllostomidoe and Pteropidse of the Cheiroptera, of which 

 in Desmodus the Cardiac portion is produced into a long intestini- 

 form reservoir, the rest of the stomach being long and narrow, bent 

 upon itself. 



In most Rodentia, and is especially noticeable in Cricetus externally 

 and Meriones internally. In Mus Rattus, the oesophageal epithelium 

 is usually continued upon the inner surface of the Cardiac compart- 

 ment, which is constricted from the middle portion, and that again 

 from the * blind sac' at the other end of the stomach ; in Arvicola am- 

 phibius, and Lemming, the Cardiac and middle compartments form 



