In a recent number of this Magazine (vol XI, 1895, p. 16) augelite was shown to be a definite mineral species, having the chemical composition AlPO4.Al(OH)3, and erystallising in the monosymme{ric system. Owing to its rarity, or perhaps to its similarity in appearance to barytes, it has previously only been described three times in mineralogieal literature, and has been f, mnd at only two localities, namely, Westans in Sweden and Machacamarca in Bolivia. It is therefore of interest to be able to record the mineral from a new locality.

The occurrence in Bolivia of minerals containing the rare element germanium has been recently noted by Prof. S. L. Penfield. One of these minerals from Potosi, described bv him in 1893, has the chemical composition of the Freiberg argyrodite (the original source of germanium), but was determined to be cubic, and not monosymmetrie, the system to which argyrodite was originally referred. To the supposed new mineral the name eanfieldite was given, but when Weisbach's reexamination showed that the Freiberg argyrodite was possibly ctlbie, the name was transferred by Penfield to another mineral containing germanium, which he described in 1894.

In this paper are recorded the observations made upon four exceptionally good specimens of atacamite in the British Museum, which have been submitted to careful study with tile object of determining the geometrical and physical characters of the mineral with greater accuracy than has hitherto been possible. The axial ratios have been calculated with the utmost refinement, an attempt has been made to determine the crystallographic symmetry by a study of the etched figures, and the values of the principal indices of refraction have for the first time been obtained.

Sphærostilbite was one of a number of sub-species which Beudant in his Mineralogy, published in 1832, separated from ordinary stilblte owing to slight differences in chemical composition. In a typical specimen from the Faroe Islands he describes the sphmrosfilbite as innplanted upon ordinary stilhite, in the form of small globules, presenting a fibrous radiated structure and brilliant pearly lustre on the fractured surface. Unlike stilhite, it gelatinlsed with acids, and it also had a specific gravity (2.31) slightly higher than that of stilhite. According to the analyses given by Beudant, however, it differed in chemical composition so little from ordinary stilbite that in later text-books (Glocker, 1839; Breithaupt, 1847, &c.) it has always been referred to that species.

This new ilmenite-like mineral, containing lead and manganese, was found in rounded fragments and rough crystals in the diamond bearing sands of Diamantina, Minas Geraes, Brazil (at Dattas, Rio Cipó, &c.).

The Owera Mine is opened on a line of lode or reef consisting of small auriferous quartz veins traversing decomposed hyperstheneaugite andesite. The quartz of the veins is highly ferruginous, and full of little patches of brown hæmatite indicating decomposed pre-existing pyrite, remnants of which are occasionally observed. It is in connection with the veins in the soft country rock and near the surface that the pseudomorphs under notice are found, and it seems probable that they owe their origin to infiltration of silica into cavities left by removal of calcite, though none has the actual form of a crystal of that mineral, which, in fact, is quite absent at the place Yet the specimen (No. 2) found with some of the pseudo-crystals tends to support this supposed origin, the hollows and, more clearly, wax impressions of them showing that the removed crystals were scalenohedra.