REVIEWS 127 



A pamphlet and geological map of Cuba, by Don Manuel Fernandez de 

 Castro, based on work commenced in 1869. Madrid, 1881. 



On the Mountains of Easter^i Cuba, by W. O. Crosby, 1882. 



" Archean Character or Rocks of the Nucleal Ranges of the Antilles," 

 by Persifor Frazer, Bath Meeting B. A. A. S., 1888. 



Coleccion de apuntes sabre la riqueza ?nifiera de la provincia de Santiago 

 de Cuba, published by Juan E. Ravelo. Santiago de Cuba, 1893. 



Reconstruction of the Antillean Continent, by J. W, Spencer, Bull. G. S. 

 A,, August 14, 1894. 



Geographical Evolution of Cuba, by J. W. Spencer, ibid., December 27, 

 1894. 



Zur Geologic von San Domingo, by W. Bergt, Abhandlung der naturw. 

 Gessell. "Isis" in Dresden, 1897. 



Ciiba and Porto Rico, with the Other Islands of the West Iftdies, by 

 Robert T. Hill. New York : The Century Co., 1898. 



This last work is a compendium of information on the subject and 

 contains an extensive bibliography of the less scientific and more 

 descriptive treatises on the West Indies. 



At the Bath meeting of the B. A. A. S. in 1888 I presented numer- 

 ous rock specimens and thin sections cut from them illustrating a 

 region of about forty miles around Santiago de Cuba. The rocks 

 were partly eruptives and partly clastic, but almost all exhibited pro- 

 found alteration. The thin sections from these eruptives were examined 

 with me by Dr. Hensoldt, Mr. Kunz, and Mr. Lacroix in this country, 

 and later by Mr. Teall, Mr. Rudler, the Abbe Renard, Professor Judd, 

 and the lamented Professor George H. Williams in London ; all of 

 w^hom were practically agreed as to the main constituents. 



The specimens were divided into : 



A. Those from the hills containing the West mine of the Jurugua 

 Iron Co. near Firmeza : (i) diorites, some of which contained much 

 altered hornblende and viridite (chlorite), the thin slides filled with 

 microlites and the rocks traversed by epidote veins ; (2) dolerites (gab- 

 bros) with chloritic groundmass, magnetite, rods of feldspar, and some 

 olivine. 



B. From the hills southeast of that in which the East mine was 

 located and about fifteen miles northeast of Santiago de Cuba : (i) 

 garnet rocks with iron ore (sp. gravity 3.962); (2) fibrous actinolite and 

 brown iron oxides partially altered to an epidotic mass ; (3) iron ores 

 (some showing cross lines like the Widmanstiltten figures in meteoric 

 iron). 



C. From the Sietes Altares, about thirty-five miles east of San- 



