PAN DE GUAJAIBON 271 



for by the fact that its rock is but little altered and 

 crystallized by metamorphic processes and is 

 therefore softer and more easily decomposed. It 

 is also likely that its position and height bring to 

 it a greater yearly percentage of moisture. What- 

 ever the true causes may be, the Pan and the 

 country immediately about offer a wealth of 

 animal and vegetable life in excess of any other 

 locality we had seen. 



The coffee and chicken-with-rice function was 

 very quickly concluded, and we fairly bolted for 

 the nearest mountain side, just back of the house, 

 some hundred yards away. Pushing through the 

 dense tangle about the base we began a slow ascent 

 of the confused piles of limestone blocks, all buried 

 in forest growth and dripping with moisture. The 

 delights of getting into a region of land-shells new 

 to our collecting were very great, and especially 

 when they were so abundant and active. Besides 

 a wealth of insect life, we found an unusual abund- 

 ance of batrachians chiefly represented by Hyla 

 or tree toads, of several exceedingly interesting 

 species. One of these of truly stentorian voice for 

 so small a toad is the Eleutherodactylus auriculatus. 

 This little fellow, of loud voice and long name, we 



