THE DEPTH AND MARINE DErOSITS OF THE PACIFIC OCEAN. 



Globigerina buUoldeii, d'Orb. 



" " var. triloba, ] 



Orbulhia universa, d'Orb. 

 Pullenia obliquiloculata, P. & J. 

 " sphwroides (d'Orb.). 

 " quinqueloba, Rss. 

 Sphceroidina dehiscens, P. & J. 

 Tnincatulina lobatula (W. & J.) . 

 " tenera, Brady. 



" pyO'i^'^'^-, Hantk. 



" dutemple/i (d'Orb.). 



" haidingerii (d'Orb.). 



" wuellerstorfi (Schw.). 



Pulvliiullna menardii (d'Orb.). 



" twmida, Brady. 



" exigiia, Brady. 



" karsteni (Rss.). 



" micheliniana (d'Orb.). 



" favus, Brady. 



" ca7iariensis (d'Orb.). 



" erassa (d'Orb.). 



" pauperata, P. & J. 



JRotalia soldanii, d'Orb. 

 Nonionina wmbilicatula (Montag.). 



" depressula (W. & J.). 



" jiompilioides (P. & M.). 



No. 33. Station 4707, 28th December, 1904. 

 Lat. 12° 33.2' S. ; long. 97° 42' W. ; depth, 2120 fathoms. 



GLOBIGERINA OOZE: olive-brown, plastic; reddish-gray and slightly 

 coherent when dried. 



Calcium carbonate : 71.01 per cent, principally pelagic Foraminifera, 

 with a few bottom-living forms [Biloculina). 

 Residue : 28.99 per cent, earthy brown : — 



Siliceous Organisms (traces), spherical Radiolaria, Sponge spicules, and 

 a few arenaceous Foraminifera. 



Minerals (traces) ; the few particles present are angular, and have a 

 mean diameter a little under 0.1 mm. ; plagioclase, augite, and manganese 

 grains may be recognized, with particles of a decomposed ferro-magnesian 

 mineral. 



Fine Washings (28.99 per cent), very flocculent, chocolate-brown clay 

 (very easily attacked by hydrochloric acid, leaving a ivhite residue), with 

 a few fragments of minerals and siliceous organisms. 



No. 34. Station 4709, 30th December, 1904. 

 Lat. 10° 15.2' S.; long. 95° 40.8' W.; depth, 2035 fathoms. 



GLOBIGERINA OOZE : there are two samples, — one pure white and 

 chalky, the other light gray, with a reddish tinge. 



Calcium carbonate : 78.10 per cent. This percentage is the mean of 

 analyses of the two samples, the white sample giving 81.20 per cent, and the 

 gray sample 75.00 per cent ; shells of pelagic Foraminifera and their com- 

 minuted fragments. 



Residue : 21.90 per cent, chocolate-brown in the case of the darker ooze, 

 yellowish in the case of the white one. The residue is easily attacked by 



