ON THE FRESHWATER FISHES OF GREAT HRITAIN. 303 



EXHIBITIONS AND NOTICES. 



May 7th, 1918. 



Prof. E. W. MacBridb, D.Sc, F.R.S., Yice-President, 

 in the Chair. 



The Ages of Elephants, as inferred from the Molar Teeth. 



Mr. R. I. PococK, F.R.S., F.Z.S., Curator of Mammals, ex- 

 hibited a series of the molar teeth of Elephants that had died in 

 the Gardens, and drew particular attention to the state of wear 

 of the last tooth of an elephant known to be about 50 years old. 

 Since this tooth comes into use in about the 40th year and had 

 lost by wear more than one-third of its laminse in 10 years, 

 Mr. Pocock concluded that the animal would have been toothless 

 •and would have come to the end of her time before she was 70. 



Mr. E. Heron-Allen, F.L.S., F.R.M.S., F.Z.S., gave a lantern 

 exhibition of Arenaceous Foraminifera of the e'enus Thurammina. 



May 28tli, 1918. 



Dr. S. F. Harmer, F.R.S., Vice-President, 

 in the Chair. 



The Secretary read the following Report on the Additions 

 to the Society's Menagerie during the month of April 1918 : — 



The registered additions to the Society's Menagerie during the 

 month of April were 209 in number. Of these 129 were acquired 

 by presentation, 77 were received on deposit, and 3 were bred in 

 the Menagerie. 



The following may be specially mentioned : — 



1 Barbary Sheep (Ammotragus lervia), born in the Menagerie 

 ori April 18th. 



1 Blossom-headed Parrakeet (Palceornis cyanocephala) 6 , from 

 India, presented by Miss H. F. Dunbar on April 27th. 



Mr. C. Tate Regan, M.A., F.R.S., F.Z.S., gave an account, 

 illustrated by lantern-slides, of the Freshwater Fishes of Great 

 Britain, with special reference to their value as food and to the 

 possibilities of increasing their economic use. 



