54 THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 
Cacrum cARBonaTE: 70.40 per cent, pelagic and bottom-living Foram- 
inifera, Ostracodes, rhabdoliths, and coccoliths. 
Resrpur: 29.60 per cent, dark chocolate-brown, very clayey :— 
Siliceous Organisms (traces) ; out of 22 grams of dried ooze there remained 
after washing only one or two centigrams of mineral particles and siliceous 
organisms of appreciable size, so that the part played by them is insignificant. 
The more abundant siliceous organisms are arenaceous Foraminifera and 
brown, imperfect casts of pelagic Foraminifera. Sponge spicules and Radio- 
laria are present, but very rare. 
Minerals (traces) ; one piece of palagonite, 2 mm, in diameter, a few 
manganese grains, 0.8 mm. in mean diameter, one or two fragments of 
colorless volcanic glass, crystals of plagioclase, and a little magnetite are all 
that could be detected. This deposit contains a good many pieces of rock, 
ranging from } inch to 2 inches in diameter. Most of them have very 
blunted edges, though they cannot be described as rounded; one or two 
pieces, on the other hand, are quite angular. The rock is very dark gray, 
nearly black, and weathers brown; it is an augite-andesite, the glassy base 
of which has decomposed and has been changed into an amorphous ferru- 
ginous clay. Some pieces have “druses” coated with a thin layer of mangan- 
ese oxide. 
Fine Washings (29.60 per cent), chocolate-brown, flocculent clay, remark- 
ably free from mineral particles and organic remains. 
The following is a list of the species of Foraminifera observed in the 
deposit from this station : — 
Biloculina depressa, d’Orb. Virgulina schreibersiana, Czjzek. 
* & var. murrhyna, Schw. Cassidulina subglobosa, Brady. 
re ringens (Lamk.), var. denticulata, Ke crassa, @ Orb. 
Brady. Lagena acuta (Rss.), var. 
Biloculina elongata, VOrb. ‘  alveolata, Brady. 
Spiroloculina acutimargo, Brady. “¢  desmophora, Ry. Jones. 
Miliolina venusta (Kar.). ‘¢  exsculpta, Brady. 
re tricarinata (aOrb.). “ — globosa (Montag.). 
of oblonga (Montag.). “6 fimbriata, Brady. 
Reophax nodulosa, Brady. Cristellaria convergens, Bornem. 
Trochammina proteus, Kar. Uvigerina asperula, Czjzek. 
Cyclammina pusilla, Brady. Globigerina conglobata, Brady. 
Verneuilina pygmea (Kigger). i sacculifera, Brady. 
Gaudryina pupoides, V’Orb. Globigerina rubra, VOrb. 
Bulimina elegans, d’Orb. e bulloides, V’Orb. 
- c var. exilis, Brady. - a var. triloba, Rss. 
Virgulina subdepressa, Brady. e dubia, Egger. 
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