Rocks and Minerals of British Guiana. 49 



34^ 



343 •• 

 344-346 



347 



343-350 



351 Granitic quartz-porphyry ... 



352 Decomposed granite 



353 Granulite 



354-357 Granite with garnets 



358-359 m with opalaceous 



quartz 

 360 „ „ ... 



LOCALITY. 



Mora. Rupununi river. 

 Pacaraima mountains. 

 Cassikitu, Upper Essequebo. 

 Above Wonotobo cataratt, 



Corentyne. 

 Essequebo river. 

 Mora, Rupununi river. 



j) >> 



Itabru cataract, Berbice 



river. 

 Near Marlissa rapid, Berbice 



river. 

 Pacaraima mountains. 

 Burro-burro river. 

 Archieculleck village. 

 Between Mora and Ireng 



river. 

 NearTomatai, Corentyne river. 

 New river. 



Mariwaru, Barama river. 

 Upper Essequebo, above King 



Wm. IV. cataraft. 



Corentyne river, below King 

 Fred. Win. IV. cataract. 



