Smithsonian Report, 1919.—Cook. PLATE 3. 
I. DENSE TROPICAL FOREST ON SUBSTRATUM OF SOLID LIMESTONE ALONG THE 
Rio DULCE, EASTERN GUATEMALA. - 
2. TROPICAL FOREST ALONG POLOCHIC RIVER, EASTERN GUATEMALA. 
Abundance of Attalea palms and silk cotton trees shows that the forest is not very old. 
