76 



" The lungs were divided into three lobes on the left side and 

 four on the right, the fourth being the lobulus medius sen impar, 

 occupying the space between the pericardium and diaphragm. The 

 heart terminated obtusely, with a slight indication of a double apex. 

 The aorta gave off the carotids and the subclavian arteries by a 

 common trunk. 



" The rings of the trachea were incomplete, their extremities 

 being separated behind by a small space. 



" The cricoid and arytenoid cartilages were of large size as com- 

 pared with the thyroid ; the apices of the latter were continued into 

 each other ; the chordce vocales were very short but distinctly 

 marked, and with a small sqcculus on each side. There were no 

 cuneiform cartilages ; the epiglottis was triangular with the apex 

 prolonged into a small mucro. Viewed from above, the aperture of 

 the larynx was circular, and was directed from behind forwards. 

 The tongue was subacuminate, minutely papillate above, with a 

 middle longitudinal line extending half an inch from the tip : it had 

 no elevated posterior part as in the Guinea-pig, Beaver, Hare, &c. 

 but at the root of the tongue there were numerous elongated cuti- 

 cular processes, and on each side o^theyauces a fold of membrane, 

 whose action is evidently to obviate too rapid transmission of the 

 food through theyhuces. 



" In the male the testes were found within the abdomen, with the 

 extremity of the epididymis projecting through the abdominal ring; 

 but as the whole gland could be pushed with ease through the 

 aperture, the Acouchy cannot be considered one of the true testi- 

 conda. The levatores penis were very distinct, arising from the upper 

 part of the pubes and terminating in tendons which ran along the 

 convexity of the dorsum penis to the glans. 



" In the female the ovaries were found of very small size and 

 apparently in a scirrhous state. 



" In both there were small clavicular bones, about the thickness 

 of a small pin, and eight lines in length, which were connected by a 

 ligament of the same length to Xhe sternum. Their office appeared to 

 be to afford a fixed point of attachment to a muscle arising from 

 the transverse processes of the cervical vertebra analogous to the 

 levator claviculcc in Apes, and to give origin to part of the deltoid, 

 by which it is better adapted to draw forwards the humerus." 



The following notes on the anatomy of the Thibet Bear ( Ursus 

 Thibetayius, F. Cuv.) were also read by Mr. Owen. The subject 

 examined was a young individual which had lived about two years 

 in the Society's Garden. 



" An extensive abscess was found under the scapula, which ap- 

 peared to have communicated with the cavity of the chest ; but the 

 lungs, heart, and liver having been removed before the animal came 

 under my hands, I had no opportunity of ascertaining the connec- 

 tion it had with diseases of those parts. 



" The length of the animal from the nose to the root of the 

 tail was 3 feet 4 inches : that of the intestinal canal 33 feet. Every 



