THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 17 
BOTTOM SAMPLES COLLECTED DURING THE FOURTH EX- 
PEDITION OF DR. ALEXANDER AGASSIZ, 1904-1905. 
The number of samples received was one hundred and six, but, unfor- 
tunately, a large proportion of these was not available for full description. 
Thus, in no less than twenty-nine cases, the labels could not be deciphered, 
most of them apparently terrigenous deposits. The labels indicating the 
position of each sample were not stuck on the bottles, but placed inside 
them, in contact with the deposit; curiously enough, in the case of the 
terrigenous deposits, the labels were, with a few exceptions, totally de- 
stroyed, while they were relatively well preserved in the samples of pelagic 
deposits. This is probably connected with the larger amount of decom- 
posing organic matter in the terrigenous deposits. 
In ten cases the material had evidently been subjected to a certain 
amount of washing, and could not therefore be looked upon as represent- 
ing the deposit in stu, while in seven cases the material consisted of man- 
ganese nodules or rock fragments without any true deposit. In this way 
the number of samples fully described in the sequel is reduced to sixty. 
These are distributed in depth as follows: — 
Damples trom Jess than 1000 fathoms; v6 vw 4 8 
Samples irom 1000;'to 2000tathoms, «4.4. 604s 5 3. 6. 1b 
Samples trom, 2000 to S000 fathoms =... 2 6k hs AT 
Samples irom over 8000 fathoms = 195 6 8 a 
OGHL e  e 60 
The types of deposit to which these sixty samples are referred are as 
follows : — 
Gilobigeningd OOZ6: 0s eS ee ee ee Oo 
Red Clay . 16 
Green Mud ae Ene ee oo. eee eS 
te MWC ei Ne a ee ee 
Caleareous Mud 1 
Voleanic Sand . 1 
Diatom Ooze ge Pe ee 
OCG ee ee ea No eee nels a 00 
Between Panama and the Galapagos Islands the “ Albatross” took 
samples of Green Sand and Green Mud in 556 and 776 fathoms respectively, 
off Mariato Point. About midway between Panama and the Galapagos 
9 
