ON METAMORPHOSED MEXICAN SALAMANDERS. 47D 



EXHIBITIONS AND NOTICES. 



March 21st, 1922. 



Dr. A. Smith Woodward, F.R.S., Tice-Piesident, 

 in the Chair. 



The Secretary read the following Report on the Additions to 

 the Society's Menagerie during the month of Februarj^, 1922 : — 



The registered additions to the Society's Menagerie during the 

 month of February were 126 in number. Of these 39 w^ere 

 acquired by presentation, 81 were deposited, 5 were purchased, 

 and 1 born in the Menagerie. 



The following may be sjDecially mentioned : — 



2 Elephants {Elephas maximzts), from India, presented by 

 H.H. The Gaekwar of Baroda on February 18th. 



1 Lioness {Felis leo), bred in India, 2:)resented by H.H. The- 

 Maharajah of Mayurbhanj on February 18th. 



1 Allamand's Grison (Grison allamandi), from Pernambuco^ 

 presented by Lt. -Commander Ruthei-ford Collins, R.N.R. 



April 4tli, 1922. 



Prof. E. W. MacBkide, F.R.S., Yice-President, 

 in the Chair. 



Mr. C. Tate Regan, F.R.S., F.Z.S., exhibited, and made 

 remarks upon, a series of lantern-slides illustrating specimens of 

 various blind fresh-water Fishes from caves. 



Mr. R. H. Burne, M.A., F.Z.S., exhibited, and made remarks 

 upon, a series of specimens demonsti\ating the recessus orbitalis 

 in Flat Fishes. 



Dr. L. HoGBEN, M.A., F.Z.S., exhibited some small examples 

 of metamorphosed Mexican Salamanders {Amhlystoma tigrinum), 

 and remarked as follows : — 



" Significant advances have been made during the past seven 

 or eight years in the study of the part played by ductless glands 

 in Amphibian metamorphosis. That the thyi^oid secretes an 

 iodine compound which stimulates the assumption of adult 

 characters, and that the removal of this gland results in a 



