4 Geology of the Gold Fields of British Guiana. 



' ' Rocks of the Aruk.i District, North -Western District." By J . B. Harrison . 1 898 



"Tlie Geology of the Essequibo, Potaro, Konawaruk and Demerara Rivers." By 

 J. B. Harrison and H. I. Perkins 1900. 



"The Geology of the Mazaruni and Puruni Rivers." By J. B. Harrison and 

 H. I. Perkins 1900. 



" The Geology of the Lower Essequibo River, the Groete Creek District and 

 the Lower Cuyuni River." By J. B. Harrison and C. Wilgress Anderson 1903. 



" The Geology of the Cuyuni River, from Arawak Matope to the Akarabisi Creek." 

 By J. B. Harrison and C. Wilgress Anderson 1905. 



"The Petrography of the Cuyuni and Mazaruni Districts, and of the Rocks at 

 Omai." By J. B. Harrison. With Notes on the Geology of part of the 

 Berbice River, by C. W. Anderson ....... 1905. 



' Explanation of the Geological Map of Parts of Barima and Barama River." By 

 J.B.Harrison 1901. 



" Explanation of the Geological Map of Parts of the Essequibo, Potaro, Konawaruk 

 and Demerara Rivers." By J. B. Harrison ..... 1901. 



" E.Kplanation of the Geological Map of Parts of the Mazaruni and Puruni 

 Rivers." By J. B. Harrison 1901. 



" Explanation of the Geological Map of Parts of the Essequibo and Cuvuni 

 Rivers." By J. B. Harrison 1906. 



