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THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 55 
Globigerina inflata, VOrb. Truncatulina ungeriana (VOrb.). 
& aequilateralis, Brady. z lobatula (W. & J.). 
Orbulina universa, V Orb. Pulvinulina micheliniana (d’Orb.). 
Pullenia quinqueloba, Rss. ¥ crassa (d’Orb.). 
sphoroides (d’Orb.). vie menardti (d’Orb.). 
Spheroidina dehiscens, P. & J. . tumida, Brady. 
Candeina nitida, VOrb. ie exigua, Brady. 
Cymbalopora poeyt (d’Orb.) (?). e umbonata, Rss. 
Discorbina eximia, Hantk. (?). £ favus, Brady. 
- bertheloti (d’Orb.), var. baconica, ee karsteni (Rss.). 
Hantk de canariensis (d’Orb.). 
Discorbina araucana (WOrb.). Nonionina umbilicatula (Montag.). 
Truncatulina wuellerstorfi (Schw.). 
No. 23. Station 4514* (hydrographic), 15th December, 1904. 
Lat. 27° 16’ S.; long. 108° 56’ W.; depth, 1552 fathoms. 
VOLCANIC SAND: brown, having an earthy texture and a mottled appear- 
ance due to the presence of yellow patches; incoherent and not plastic 
when wet. A decomposed soft piece of pumice (14 inches in diameter), 
coated with manganese, was picked out. 
CALcIuM CARBONATE: 11.81 per cent, various species of pelagic Foramini- 
fera; other organisms were not detected. 
ResipuE: 88.19 per cent :— 
Siliceous Organisms (traces), a few Sponge spicules sticking to the sur- 
faces of some of the larger mineral particles. 
Minerals (19.48 per cent), principally fragments of decomposed pumice 
and grains of the oxides of iron and manganese (1 to 2 mm. in diameter), the 
latter containing much more iron than manganese. The actual mineral par- 
ticles are angular, and have a mean diameter of 0.2 mm.; they are repre- 
sented by common augite and olivine, and by plagioclase particles, which 
could not be accurately determined ; there is also the yellow, opaque product 
of decomposition of some ferruginous mineral. 
Fine Washings (68.71 per cent), mostly fine mineral particles, with a 
very little clayey matter. 
No. 24. Station 4516,* 22nd December, 1904. 
Lat. 26° 54.8’ S.; long. 109° 16.4’ W.; depth, 1627 fathoms. 
GLOBIGERINA OOZE: fine-grained, plastic, gray, drying into chalky 
lumps having little coherence ; contains one angular rock fragment a quarter 
of an inch in diameter. 
CALCIUM CARBONATE: 33.33 per cent; pelagic Foraminifera (Globigerina, 
