Reports & Proceedings — Mineralogical Society. 45 



and that of the apes more closely than it agrees with the permanent 

 canine of any known ape. In accordance with a well-known 

 palaeontological law it therefore approaches the canine of the hypo- 

 thetical Tertiary Anthropoids more nearly than any corresponding 

 tooth hitherto found. 



The rolled fragment of an upper molar of Rhinoceros is highly 

 mineralized, and has the appearance of a derived fossil. It is 

 specifically indeterminable, but seems to agree best with the teeth 

 of Rh. etruscus or Rh. mercJci { = leptorhi7ius, Owen). 



II. — Mineralogical Society. 



Anniversary Meeting, November 11. — Dr, A. E. H. Tutton, F.R.S., 

 President, in the Chair. 



A. Hutchinson and A. M. MacGregor : A Crystalline Basic Copper 

 Phosphate from Rhodesia. The mineral occurs at the Bwana 

 M'Kubwa copper-mines as a crust of minute, brilliant, peacock-blue, 

 orthorhombic crystals, associated with malachite. Axial ratios 

 a : b : c = 0-394 : 1 : 1-01 ; forms 110, Oil; hardness 4-5; specific 

 gravity 4'1. Chemical composition, determined by an analysis of 

 a small quantity of carefully-selected material, approximates to the 

 formula 2 Cug (P04)2, 7 Cu (OH); no water is lost on heating to 

 190°. Although it has much the same composition as some minerals 

 included in the pseudomalachite family, it differs widely in its 

 physical characters from dihydrite, the only well-defined crystalline 

 member of the group, and is probably a new species. — Dr, G. T. Prior : 

 On the Meteoric Stone of Wittekrantz, South Africa. The stone, 

 which fell on December 9, 1880, at the farm Wittekrantz, Beaufort 

 West, Cape Colony, is slightly chondritic, and consists of the usual 

 aggregate of olivine and bronzite, with particles of nickeliferous iron 

 and troilite. In chemical and mineral composition it is very similar 

 to the Baroti meteorite previously described. — Dr. G. T. Prior : On 

 the remarkable similarity in chemical and mineral composition of 

 Chondritic Meteoric Stones. The close similarity presented by most 

 chondritic meteoric stones, although generally recognized, has to 

 some extent been obscured by the unduly elaborate classifications 

 which have been devised. A review of the quantitative mineral com- 

 position of forty-two chondritic stones, and a critical examination of 

 the published analyses of others, lead to the conclusion that almost all 

 those at present known are, except for some variation in the amount of 

 nickeliferous iron, practically identical in chemical and mineral com- 

 position, the identity extending even to the chemical composition of 

 the individual constituents. They approximate to the type with the 

 following percentage mineral composition : nickel-iron (Fe : Ki= 10) 9, 

 troilite 6, olivine (Mg : Fe = 3) 44, bronzite (Mg : Fe = 4) 30, 

 felspar 10, chromite, etc., 1. — Arthur Russell : jS'otes on the Minerals 

 occurring in the neighbourhood of Meldon, near Okehampton, Devon- 

 shire. The principal species are datolite, in crystals sometimes 

 2\ cm. in length, sea-green in colour and nearly transparent, 

 polysynthetically developed, and showing a cleavage parallel to 001 ; 



