206 J. W. SPENCER, M.A., ON THE WEST INDIES. 



Mexico, others reported in the region of the Azores, in Japan, 

 and the great earthquakes of Guatemala, Chinese Turkestan, 

 etc., all belonging to parallel zones, yet they seem to point to 

 some terrestrial disturbance of a general common origin acting 

 parallel with the line of the equator, as if the movements are 

 readjusting the terrestrial crust in a transverse as well as a 

 normal direction. In fact, we know but little about volcanicity, 

 and it seems strange how little has been added to our knowledge 

 by the recent eruptions almost at our own doors. 



The effects of the eruptions have been made known to us in a 

 popular way through very many media of communication, so 

 that the writer has deemed it desirable only to respond to the 

 courteous request for a contribution, by telling something of the 

 relation of the igneous formations to their place in geological 

 history, as based upon travel among the islands ; and some of 

 his data for the opinions here expressed, have already been 

 published, and to them the reader is referred, and for this 

 reason, fuller detail here becomes unnecessary. 



Eeferences. 



" On the Geology of the North-eastern West India Islands," by P. T. 

 Cleve, Trans. Roy. Swedish Acad. JSoc, ix, No. 12 (1870). 



Geology of Barbados," by Messrs. J. B. Harrison and A, J. Jukes- 

 Browne, Quart. Jour. Geol. Soc, vol. xlvii (1891), and vol. xlviii 

 (1892). 



"Reconstruction of the Antillean Continent," by J. W. Spencer, BulL 

 Geol. Soc. Ann., vol. vi (1894). 



"On the Geological and Physical Development of Antigua " ; " of Guade- 

 loupe " ; of Anguilla, St. Martin," etc. ; " of the St. Christopher 

 Chain," etc. ; " of Dominica, with notes on Martinique, St. Lucia, 

 St. Vinnent, &c.'"' ; "of Barbados, with notes on Trinidad." Six 

 papers by the present writer in Quart. Jour. Geol. Soc, volumes Ivii 

 and Iviii, 1901 and 1902. 



Note. —The Council is indebted to Dr. Tempest Anderson for the loan 

 of lantern slides from photos taken by himself and Dr. J, S. Flett when 

 investigating the recent eruptions in St. Vincent and Martinique at the 

 instance of the Poyal Society. The Report was presented to the Royal 

 Society on November 20th, 1902, and since then Dr. Anderson has 

 contributed a paper on the eruptions to the Royal Geographical Society, 

 which is published in the Geographical Journal, March, 1903. — E. H. 



