ON MITOSIS IN ENAMEL CELLS. 943 
EXHIBITIONS AND NOTICES. 
June 9, 1914. 
Prof. E. A. Mincutn, M.A., F.R.S., Vice-President, 
in the Chair. 
The Secrerary read the following report on the additions to 
the Society’s Menagerie during the month of May 1914 :— 
The number of registered additions to the Society’s Menagerie 
during the month of May was 230. Of these 116 were 
acquired by presentation, 36 by purchase, 43 were received on 
deposit, 10 in exchange, and 25 were born in the Gardens. 
The number of departures during the same period, by death 
and removals, was 220. 
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Amongst the additions special attention may be directed to :-— 
2 Bladder-nosed Seals (Cystophora cristata) 3 2, from Green- 
land, purchased on May 18th. 
1 Reindeer (Langifer tarandus) g, born in the Menagerie on 
May 9th. 
6 Long-tailed Bats (Rhinopoma microphyllum), from India, 
new to the Collection, received in exchange on May 12th. 
4 Red-headed Bulltinches (Pyrrhala erythrocephala), from the 
Himalayas, new to the Collection, and 2 Cotton-Teal (Wettopus 
coromandelianus), from India, presented by Alfred Ezra, F.Z.S., 
on May 15th. 
2 Cuvier’s Toucans (Ramphastos cuvieri), from the Upper 
Amazons, purchased on May 12th. 
1 Maximilian’s Parrot (Pionws maaimiliant), from Brazil, and 
2 Petz’s Conures (Conurus canicularis), from Mexico, presented 
by the Marquess of Tavistock, F.Z.8., on May 28th. 
2 Open-bills (Anastomus oscitans), from India, purchased on 
May 20th. 
Mr. J. Tuornron Carrer, F.Z.S., exhibited microphotographs 
showing phases of mitosis in the cells of the enamel organ in 
Dasyurus viverrinus and Trichosurus vulpecula. The demonstra- 
tion of mitosis in the enamel cells has not been recorded 
previously—in fact, little has been published dealing with the 
cytological changes which produce the differentiation of the 
various cells composing an enamel organ. 
In a paper to be submitted to the Society during the next 
session, Mr. Carter deals at length with the cytology of the cells 
of the enamel organ in Mammals, Reptiles, Fishes, ete., in all of 
which abundant evidence of mitosis has been found. 
