Woopwortu.— Geological Expedition to Brazil and Chile. 
PLATE 24. 
Ice-rafted boulder and stones in shales near Rio Negro, Santa Catharina. 
Same locality as Plate 28. Thisshale underlies the earthy bed shown in Plate 
23, and contains near bottom of view a 1.5 inch band of the same material. 
Surface shows the herbaceous growth of the open lands between forested 
tracts. The boulder isa gneiss. Page 68. 
