Zoological Society. 505 



thinner than those of the rest of the large intestine ; it was situated 

 below the pyloric end of the stomach, had only a partial investment 

 oi peritoneum, and adhered by a cellular medium to the duodenum and 

 pancreas. Below this second cacum, or lateral dilatation, the colon 

 formed a large saccidus, and was then disposed in a series of smaller 

 sacculi, which at length disappeared at a distance of 6 feet from the 

 second cacwn ; the rest of the large intestine, 3 feet in length, was 

 of simple structure, and of smaller diameter, viz. \\ inches. 



" The internal surface of the small intestines presented some slight 

 transverse corrugations ; that of the colon was smooth, except below 

 the second cacum, where the lining membrane was corrugated irre- 

 gularly; and a small patch of glands was here observable. 



" The rectum terminated, as in other Marsupials, immediately be- 

 hind the urethro-sexual aperture, and within a common outlet, both 

 the excretory orifices being embraced by a common cutaneous 

 sphincter. 



" The liver was more completely separated into lobes than in the 

 specimen dissected by Cuvier. Home is silent as to the structure 

 of the liver ; his observations respecting the digestive organs are li- 

 mited to the peculiarities of the stomach. In our specimen the liver 

 was divided by an extensive longitudinal fissure into two lobes, the 

 right of which was again deeply subdivided into two, the gall-bladder 

 being lodged in this second fissure : the gall-bladder was of an oval 

 form, 24- inches in length. 



" The pancreas and spleen were both well developed, and had each 

 the descending process which characterizes these parts in the Mar- 

 supial animals. 



" The parotid glands were very thin, situated upon, and partly on 

 the inner side of, the posterior ])ortion of the lower jaw; they mea- 

 sured each 1-1- inch in length, and 4- inch in breadth ; the duct passed 

 directly upwards and outwards till it reached the orifice of the sterno- 

 cleido-mastoideus ; here it was buried in the cellular substance anterior 

 to that muscle, then turned over the ramus of the jaw, and continued 

 its course over the masseter, where it was slightly tortuous ; it en- 

 tered the mouth just anterior to the edge of the buccinator. The 

 submaxillary glands were each about the size of a walnut ; their 

 ducts terminated, as usual, on each side oi the frcenum linguce. 



" The heart of the Wombat presented the usual peculiarities oc- 

 curring in this part of the Marsupial organization; viz. 1st, the two 

 appendages of the right auricle, one passing in front and the other 

 behind the ascending aorta ; 2ndly, the absence of the anniihis and 

 fossa ovalis; and 3rdly, the absence of the terminal orifice of the co- 

 ronary vein which empties itself into the cava superior sinistra just 

 before the wide termination of tlie latter vein in the auricle by the 

 side of the caini inferior. The right auriculo-ventricular ojjcning is 

 widely open, and is guarded by an irregular narrow membranous 

 valve, the outer portion of whicli is attached to the tendons of three 

 carnea columns ; two of which are of a large size as compared with 

 the third, and arise, as in the Kangaroo, from the septum near the 

 angle where this is joined to the parietes of the ventricle. The mus- 



Third Scries. Vol, 9. No. 57. Supplement. Dec. 18.36. 3 F 



