102 
THE VOYAGE OF H.M.S. CHALLENGER. 
forms it contained were Alveolina melo, Textularia siplionifera, Chrysalidina 
dimorpha, Pavoninafiabelliformis, Truncatulina echinata, and Frondicularia 
robusta. 
Station 265. — August 25, 1875. Lat. 12° 42' N., long. 152° 1' W. Depth, 2900 
fathoms; bottom temperature, 0°'8 C. ; red clay. 
A reddish brown siliceous mud, giving no perceptible effervescence on treatment 
with acid; containing Radiolaria, sponge-spicules and perforated siliceous 
flakes, the fragments of a gigantic Diatom. Except two or three Miliolce and 
as many Globigerina, no calcareous Foraminifera were met with. Of the 
Arenacea, Ammodiscus gordialis and Haplophragmium latidorsatum were the 
most frequent species, but there were fragments of some others, chiefly of 
tubular forms like Hyperammina. 
N. Stations 271 to 298, South Pacific, from the Equator, about long. 150° W., south- 
ward through the Low Archipelago, then south-east to Lat. 40° S., and east 
to Valparaiso. 
Station 271. — September 6, 1875. Lat. 0° 33' S., long. 151° 34' W. Depth, 2425 
fathoms ; bottom temperature, l o, 0 C. ; Globigerina ooze. 
The dredged material might, with almost equal propriety, be called a 
Radiolaria ooze, from the relative abundance of siliceous Rhizopoda. The 
larger Foraminifera were chiefly of two species, Pullenia obliquiloculata and 
Pulvinulina tumida. All the common varieties of Globigerina were present, 
together with such genera as Lagena, Nodosaria, Truncatulina, and 
Nonionina ; but perhaps the species most characteristic of the locality were 
Pulvinulina fiavus and Ehrenbergina serrata. 
Station 272. — September 8, 1875. Lat. 3° 48' S., long. 152° 56' W. Depth, 
2600 fathoms ; bottom temperature, l o, 0 C. ; Radiolaria ooze. 
A reddish clay, largely composed of Radiolaria. Foraminifera of very much 
the same aspect as at the last Station. Pulvinulina fiavus was again promi- 
nent, but Ehrenbergina was not observed. 
Station 276. — September 16, 1875. Lat. 13° 28' S., long. 149° 30' W. Depth, 
2350 fathoms ; bottom temperature, 1°‘0 C. ; red clay. 
Dark reddish brown mud, with pumice and manganese nodules ; abundance of 
siliceous organisms, Radiolaria, sponge-spicules, &c. ; containing no very large 
number of Foraminifera, and chiefly remarkable for the variety and beauty 
of the Lagencv. For the rest, there was nothing worthy of note except 
Pulvimdina fiavus and Reophax dijfiugiformis. 
