Zoological Society. 57. 



cerebrum. The internal structure of the brain has not yet been ex- 

 amined ; some previous preparation of that part having been 

 deemed necessary, in order to render it sufficiently firm for dis- 

 section. 



The structure of the larynx is minutely described, and contrasted 

 with the anatomy of the same part in the Chimpanzee, in which 

 the laryngeal sacs are not developed as in the Orang. The left 

 laryngeal sac in the present instance was the largest, and extended 

 over the top ef the sternum. In the Chimpanzee the laryngeal sac 

 is produced into a cavity in the body of the os hyo'ides, presenting 

 the first indication of the excavation which is carried to so great an 

 extent in the Monkeys of the genus Mycetes. The thyroid gland is 

 small in the Orang. The lungs are entire on each side, and not 

 divided into lobes. The aorta gives off by a common trunk the 

 right subclavian and the right and the left carotid arteries, the 

 latter of which is given off in the Chimpanzee, as in man, from the 

 arch of the aorta. 



In the course of his illustrations of the anatomical differences 

 which exist between the Orang and the Chimpanzee, Mr. Owen 

 frequently referred to Tyson's " Anatomy of a Pigmy", and con- 

 firmed many of the descriptions given in that work. 



Nov. 23, 1830. Dr. Waring in the Chair. 



The following letter from F. Jenkins, Esq., Secretary to the 

 Physical Committee of the Asiatic Society, was read : 



" Calcutta, 24th March 1830. 



" Sir, I am directed by the President of the Physical Com- 

 mittee of the Asiatic Society to present, in their name, to the 

 Zoological Society, a small collection of Indian Birds, made (for 

 our Society) by Capt. Franklin (one of its most zealous members) 

 during a late geological tour. 



" I am instructed at the same time to state, that it will afford 

 pleasure to the Physical Committee of the Asiatic Society to pro- 

 mote as far as may be in their power, the views of the Zoological 

 Society in this country ; and they will be happy to receive commu- 

 nications of their wishes on the subject. 



" The collection is in charge of Captain Franklin, who is pro- 

 ceeding in the ship Lady Nugent, to England. I am, &c. &c. 



" N. A. Vigors, Esq. Sec. Z. S. F. JENKINS." 



The collection alluded to in the preceding letter was laid on the 

 table. It was formed by Major Franklin, F.R.S., &c. on the 

 banks of the Ganges, and in the mountain chain of Upper Hindoo- 

 stan. It contained one hundred and seventy-one species, and was ac- 

 companied by drawings of each of the birds, made while they were 

 recent. Mr. Vigors briefly remarked on several of them, as afford- 

 ing interesting illustrations of the extent of the geographical dis- 

 tribution of certain species. He declined to enter at any length 

 into the subject, which he expected would be fully treated of by 

 Major Franklin in a paper which that gentleman was preparing, 

 and which would be communicated to the Committee at an early 

 meeting. 



Mr. T. Bell exhibited a pair of living Acouchies t ( Olive Cavy, 

 N. S. Vol. 9. No. 4-9. Jan. 1831. I Penn., 



