Notes on the Province of Ceara. 75 



sideratum to young students, to whose early progress the technical terms 

 of the science have hitherto presented formidable impediments. This 

 want has been recently supplied by two publications of this kind, one by 

 Mr George Roberts, author of the History of Lyme.Regis ; the other by 

 Dr Humble. 



During the last year the society has received no communication on 

 mineralogy ; and almost the only volume that has been published in Eng- 

 land on this much-neglected subject, has been a small but highly elabo- 

 rate treatise on crystallography by Professor Miller, of the University of 

 Cambridge. In this treatise the author has adopted the crystallographic 

 notationproposed by Professor Whewellin his paper on a general method 

 of calculating the angles of crystals, and the laws according to which they 

 are formed, published in the Transactions of the Royal Society of London, 

 1825 ; and Professor Neuman's method of indicating the positions of the 

 faces of a crystal by the points in which radii, drawn perpendicular to 

 the faces, meet the surface of a sphere. The expressions which have been 

 thus obtained are remarkable for their symmetry and simplicity, and arc 

 all adapted to logarithmic computation, and for the most part new. 



Geological Notes made during a Journey from the Coast into 

 the Interior of the Province of Ceara, in the North of Brazil, 

 embracing an Account of a Deposit of Fossil Fishes. By 

 George Gardner, Esq., of Glasgow. Communicated by 

 J. E. Bowman, Esq., of Manchester. 



The knowledge of the fact that but little, if any thing, of 

 the o-eology of this province has hitherto been made known, 

 induces me to offer the following sketch of those parts of it 

 which I have visited, drawn up from the daily notes of my 

 journal. However imperfect it may be, I trust that it will 

 not be altogether useless, as it gives at least a general idea 

 of the structure of a part of this great empire, which, so far 

 as I can learn, has never before been visited by any of the 

 many naturalists who, for the last twenty years, have at various 

 times traversed other portions of it. 



The province of Ceara, which is situated between the third 

 and eightib degrees of south latitude, and the thirty-seventh 

 and forty-first of west longitude, is bounded by the sea to the 

 north ; by the provinces of Rio Grande do Norte, and Parahi- 

 ba to the east ; by that of Pernambuco to the south ; and to 

 the west by a low mountain range which divides it from the 

 great inland province of Pianhy. I landed at the north-east 



