140 Heports and Proceedings — Geological Society of London. 



Pliocene period, and is doubtless related to several other small 

 Cervidse, some of which, like the Chinese water-deer, are hornless 

 forms. 



We must now part with Mr. Millais, but we do so with regret. 

 We cannot imagine a more charming book for the Library table of 

 a country house than his " British. Deer and their Horns." 



I^E^'OI^Ts j^isriD i=K,OGE3E3Diisra-s. 



Geological Society of London. 



January 19, 1898.— Dr. Henry Hicks, F.E.S., President, in the 

 Cliaii-. The following communications were read : — 



1. "On some Gravels of the Bagshot District." By Horace W. 

 Monckton, Esq., F.L.S., F.G.S. 



The author refers to his papers on Gravels South of the Thames 

 published in the Quart. Journ. Geol. Soc. for 1892 (p. 29) and 1893 

 (p. 308), and gives some additional details. 



He suggests that the occurrence of stones which have been very 

 little rolled or waterworn in gravels at certain localities affords 

 evidence of the presence of ice in the water by which those gravels 

 were deposited, and that the position of some sarsens which he 

 describes is due to the same agency. 



He gives details and exhibits photographs of a number of sarsens 

 which he has seen in situ. 



2. " On the Occurrence of Chloritoid in Kincardineshire." By 

 George Barrow, Esq., F.G.S. (Communicated by permission of the 

 Director-General of the Geological Survey.) 



The rock containing the chloritoid was first found in situ at the 

 entrance to the little gully at the head of Friar Glen Burn, near 

 Drumtochty Castle. It has since been observed at many places 

 along a belt of country extending from the coast north of Stone- 

 haven nearly as far as the North Esk. 



The rock is easily recognized by the presence of numerous white 

 spots, which are always present and are larger than the chloritoid. 

 The chloritoid and the spots vary in size, being largest when 

 the rock is most crystalline (a schist), and smallest when it is least 

 crystalline (a slate). The mineral appears as minute glistening 

 scales in the schist, but in the slate it can be recognized only with 

 the aid of the microscope. 



The optical characters are described, and shown to be identical 

 with those of the mineral from the lie de Groix, and with, those of 

 the ottrelite from Ottre and Serpent. 



An account of the methods adopted to obtain a pure sample is 

 given. Several analyses were made, and it was proved that as the 

 purification increased the analyses approximated more and more 

 closely to the analysis of the mineral from the lie de Groix. 



The final result was as follows : — 



