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NATURAL HISTORY SOCIETY OF GLASGOW. 



SUMMER SESSION, 1888. 



THE SOCIETY'S ROOMS, 207 BATH STREET. 



16th May, 1888. 



Dr. James Stirton, F.L.S., in the Chair. 



Mr. Richard M'Kay reported on an excui'sion made to Nitshill 

 on 12th inst. 



Mr. D. A. Boyd exhibited specimens of several species of 

 Isopods from West Kilbride, Ayrshire, including PorcelUo 

 arniadilloides, Lereb., Idotea tricuspidata, Desm., and Ncesa 

 bidentata, Adams. 



Mr. Thomas King, Vice-President, exhibited a specimen of 

 Morchella semilibera, DC, from Darnley Glen, and stated that 

 the species had not been previously recorded for the West of 

 Scotland. 



Mr. R. Broom, B.Sc, showed a number of microscopical 

 preparations, illustrating the development of enamel and 

 dentine. He gave an interesting account of the various stages 

 in the development of a tooth, and of the individual dental 

 tissues. Among the preparations submitted were some very 

 fine sections of the lower incisors of a seven-month human 

 foetus, which showed very distinctly the connection between 

 the enamel-cells and the enamel-prisms. Tome's processes being 

 cleai'ly seen passing into the centre of the prisms. He also 

 exhibited numerous detached enamel-cells showing Tome's 

 processes, and some detached odontoblasts, as well as odonto- 

 blasts connected with the dentine. 



Mr. Matthew Ballantine exhibited a series of microscopical 

 slides of Diatomaceje and other objects. 



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