Prate 1, 
Fra. 1. Typical manganese nodule from Station 4658, November 14, 1904, lat. 8° 29.5’S., 
long. 85° 35.6’ W., depth, 2370 fathoms. All the nodules dredged from this sta- 
tion may be referred to this type. The photograph shows well the symmetrical 
shape round an axis, and the two surfaces, one,smooth, the other roughly mam- 
millated. 
Fra. 2. Section of another nodule from Station 4658. The apex is occupied by a well- 
preserved ear-bone. The structure in alternate layers is well displayed, showing 
how the internal layers espouse the contours of the dome-shaped smooth surface. 
