THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 43 



Lagena alveolata, Brady. 

 " exsculpta, Brady. 

 " gracilis, Will. 

 " feildeniana, Brady. 

 Polymorphina angusta, Egger (?). 

 Uvigerina hrunnensis, Karrer. 

 " asperula, Czjzek. 

 " « var. ampullacea, Brady. 



" tenuistriata, Ess. 



Truncatulina ungeriatia (d'Orb.). 

 " akneriana (d'Orb.). 



" wuellerstorji (Schw.). 



Anomalina ammonoides (Ilss.). 

 Pulvinulina menardii (d'Orb.). 



" " var. ^»t6rta<a, Brady. 



" tvmida, Brady. 



" micheliniana (d'Orb.). 



" canariensis (d'Orb.). 



" karsteni (Rss.). 



" exigua, Brady. 



" crassa (d'Orb.). 



Pulvinulina umbonata, Rss. 



" pauperata, P. & J. 



Rotalia brceckfiiana, Kar. 



" soldanii, d'Orb. 

 Globigerina dubla, Egger. 

 " rubra, d'Orb. 



" inflata, d'Orb. 



" sacculifera, Brady. 



" conglobata, Brady. 



" bulloides, d'Orb. 



" " var. triloba, Rss. 



" wquilateralis, Brady. 



" pachyderma (Ehreub.) (?). 



Orbulina universa, d'Orb. 



" porosa, Terq. 

 Pullenia obliquiloculata, P. & J. 

 " quinqueloba, Rss. 

 " sphceroides (d'Orb.). 

 Nonionina umbilicatida (Montag.). 

 " pompilioides (F. & M.). 



No. 4. Station 4639, 6th November, 1904. 

 Lat. 0° 4' S. ; long. 87° 39.5' W. ; depth, 1418 fathoms. 



GLOBIGERINA OOZE: gray, plastic, drying into hard lumps; no mac- 

 roscopic elements. 



Calcium cakbonate : 55.57 per cent, present in two forms: (1) as shells 

 of Foraminifera belonging to the genera Globigerina and Pulvinulina, and (2) 

 as microscopic particles due probably to the mechanical destruction of 

 similar shells ; these form a fine mud easily washed away, so that the liquid 

 containing them effervesces readily with acid. 



Residue : 44.43 per cent: — 



Siliceous Organisms ( 0.5 per cent ) ; these form the greater part of the 

 heavier parts of the residue. They are represented by a great variety of 

 Radiolaria in a fine state of preservation, by Sponge spicules, and by 

 Diatoms. 



Minerals (traces ) ; they can be estimated only as traces, as they are 

 present with the siliceous organisms in the proportion of one mineral parti- 

 cle to every ten organisms. They are angular, and the mean diameter is 

 0.05 mm. Pale augite is the principal constituent, and is accompanied by a 

 very little magnetite and a few shapeless flakes of some kind of green 

 chlorite. 



