SCIENTIFIC SUMMARY. 
441 
Lave a very important bearing on tbe evolution of mammals, and open an 
interesting field for further investigation. 
METALLURGY, MINERALOGY, AND MINING. 
The Crystallography of Datolite. — A paper on this subject appears in 
<l Tschermak’s Min-Mittheilemgem,” by Mr.S. Dana (Vienna, 1874), and con- 
tains the results of a crystallographic study of the datolite of the principal 
European localities, and is illustrated by a plate containing figures of crystals 
from Tuscany, Arendal, and Andreasberg, with also, for comparison, three of 
the forms described and figured by the author in his Bergen Hill paper.* In 
addition, a catalogue is given of all the known planes of datolite crystals, now 
numbering seventy-one, of which sixteen were added by Mr. Dana from the 
Bergen Hill crystals, and ten from those of foreign localities. A table contains 
the principal angles of all the forms, for the most part recalculated by the 
author, and a diagram presents a map-projection, after Miller’s method, of 
all known planes in their zones. The crystals studied were from the Royal 
Mineralogical Museum of Vienna, of which Professor Tschermakis Director. 
Mineralogy of Chili . — The President of the University, Don I. Domeyko, has 
published a work on the mineralogy of Chili, which appears to be of value. 
The fourth appendix to the second edition of this contains notes on new 
localities, with descriptions of various minerals, the most of them metallic 
species. Eor a double chloride of silver and mercury at Los Bordos, in the 
department of Coppiapo, the name Bordosite is given by Senor Bertrand. 
Ulexite and Hayesite are stated to have been found at a locality on the 
river Loa in littoral Bolivia, and in Carmen Alto, fourteen leagues from 
Antofagasta, the old localities being in the desert of Atacama in Peru, and 
■at Ascotan in Bolivia. In addition, Domeyko now adds another locality at 
*01a, about thirty leagues to the east of the mines of copper of Chanaral de 
las Animas, north-east of the range of Dona Ines ; the place appears like a 
dried lake. The locality of borocalcite (Hayesite), in the dry lake of 
Maricunga, fifty-nine miles to the north of Puquios, is, according to Fonseca, 
of great extent, he estimating the amount at 14,000,000 tons. A memoir 
on the subject has been published by Fonseca in the u Anales de la Univer- 
sidad.” It is mainly a hydrated horate of lime — boraclite, mixed with some 
■common salt, but without any ulexite (boronatrocalcite). 
A new Mineral : Veszelyte . — A new mineral has recently been described by 
Professor A. Schrauf, the eminent crystallographer of Vienna, under the 
name of Veszelyte. It is triclinic, resembling distorted liroconite, the 
crystals being bounded by the prism and dome (100 : 041 = 101° 3'). It 
has a bluish-green colour, and the composition is expressed by the formula 
4Cu0P 2 05 2 H 2 0. It occurs on garnet at Morawitza, in Banat. It is named 
from the discoverer. 
Ataeamite from South Australia. — Mr. A. S. Dana has recently (says 
,<l Silliman’s American Journal,” August 1874) published the results of a 
* u Silliman’s American Journal,” III. iv. 16. 
