130 Proceedings of Learned Societies. 



and the quantity in the latter state was always found to be con- 

 siderable, and in some instances greater than the quantity in com- 

 bination. Dr. Prout obtained similar results in different animals, 

 as well as in the human subject, and in one instance, from twenty 

 ounces of fluid ejected from the human stomach, in a severe de- 

 rangement of that organ, he found upwards of half a drachm of 

 muriatic acid of specific gravity 1-160. 



January 29, 1824. — A Paper was communicated by Sir E. 

 Home, entitled " Observations on the Iguana tuberculata, or 

 common Guana; by The Rev. Lansdown Guilding, B. A. 



F.L.S." 



This paper commenced with some remarks on the necessity in 

 zoology of describing animals from living specimens ; in conse- 

 quence of inattention to which, naturalists had committed various 

 errors in describing the characters of certain lizards, particularly 

 in representing their gular process as a pouch capable of dilata- 

 tion. The principal object of Mr. Guilding's observations on the 

 Guana, was briefly to describe an organ on the parietal bones of 

 the head of that animal, to which he gives the appellation of 

 foramen Homianum, in honour of Sir E. Home. It does not 

 afford a passage to any nerve or blood-vessel. 



Mr. G. proposed, should it be acceptable to the Royal Society, 

 to lay before that body a general anatomical account of the Saurian 

 reptiles of the Antilles. 



tINNEAN SOCIETY. 



The first meeting of this Society, after the summer recess, took 

 place on the 4th of November, 1823. Among the presents then 

 received, were specimens of 85 species of birds, which had been 

 sent from the East Indies by Major General Hardwicke, F. R. 

 and L. S. ; together with a curious species of Musk Rat ; and 

 the head of J7itilope quadricornis, (the Chikara of Bengal,) 

 General Hardwicke's description of which had been read to the 

 Society, on the 17th of the preceding June. 



The papers read were as follows : 



A description of the Swallow-tailed Falcon, Falco fiircutusy 



