X 
Transactions of the Royal Society of South Africa. 
Communications : 
Note on a Case of Hermaphroditism." By H. Y. Exner. 
The author describes as a case of hermaphroditism the body of a person 
of unsound mind, who had the outward appearance of a Kafir girl. The 
nature of the case was only recognised after a histological study of the 
genital organs. 
" Note on the genus Terfezia : A Truffle from the Kalahari. By I. B. 
POLE-EvANS. 
Attention is drawn to the fact that Choeromyces, a truffle hitherto 
unknown to Africa, has recently been reported from South Africa. The 
author points out that the best known South African truffles belong to the 
genus Terfezia. 
The distinction between Choeromyces and Terfezia is indicated, and a 
description is given of a truffle (T. Claveryi Chat.) recently sent to the 
author from the Grriqualand West district in the Kalahari. 
Ordinary Meeting. 
August 15, 1917. 
Dr. L. Crawford in the Chair. 
The Minutes of the previous meeting were confirmed. 
Communications : 
" Note on the Eesolvability of the Minors of a Compound Determinant." 
By Sir Thomas Muir. 
Colour and Chemical Constitution (Part II) : The Spectra of the 
Mixed Phthaleins and of the Sulphone-phthaleins." By James Moir. 
Mixed phthaleins, containing two different phenol residues, one of which 
is C,;H^OH, are made with extraordinary ease by boiling paraoxybenzo- 
phenone-o-carboxylic acid with any phenol or amine, whether free or substi- 
tuted. The spectra of 18 new phthaleins of this class are described, and 
the laws governing the colours are elucidated. This method is an excellent 
analytical one for identifying phenols and amines and their ethers and 
derivatives. The spectrum of phenolthymolphthalein is not exactly half- 
way between those of phenolphthalein and thymolphthalein. The spectra 
of 5 sulphonephthaleins made from " saccharin " are also described, also 
6 more new derivatives of ordinary phenolphthalein (see Part I). 
A new general formula for the coloured substances is put forward. 
" Kimberley Diamonds : Especially Cleavage Diamonds." By J. E. 
Sutton. 
This paper is a general and statistical account of the diamonds produced 
in the mines under the control of the De Beers Company at Kimberley. It 
