[3] 



ALBATROSS EXPLORATIONS. 



605 



hard <3lay resemble large angular blocks of stone, but when cut with a 

 knife they have a consistency somewhat like hard castile soap, and in 

 sections are mottled with lighter and darker tints of dull green, olive, 

 and bluish gray. When dried they develop cracks and break up into 

 angular fragments. This material is genuine clay, mixed with more or 

 less sand, showing under the microscope grains of quartz and feldspar 

 with some scales of mica. More or less of the shells of Globigerina and 

 other foraminifera are contained in the clay, but they make up a very 

 small percentage of the material.* 



LIST OP STATIONS OCCUPIED BY THE " ALBATROSS " IN 1883. 



The following abbreviations are used to indicate the character of the 

 bottom. They are the same as those used by the United States Goast 

 Survey with a few additions desirable for greater precision : 



In the following list the character of the bottom is not always given 

 as in the original record, for in some cases colors or other qualities have 

 been omitted, when unimportant, for the sake of condensation. In other 

 cases additions or alterations have been made based on the materials 

 actually brought up in the dredge or trawl, often in large quantities : 



* This kind of material was encountered in much larger quantities during the past 

 season (1884) than in 188.3. Soe American Journal of Science for November, 1884. 



