90 THE DEPTH AND MAEINE DEPOSITS OF THE PACIFIC OCEAN. 



No. 24. Station 41, 24th September, 1899. 

 Avatoru Passage, Paumotu Islands ; depth, 684 fathoms. 



PTEROPOD OOZE : cream colored with a tinge of pink, incoherent, fine- 

 grained. 



Calcium carbonate : 80 per cent, Pteropods, Heteropods (Atlanta), pelagic 

 and bottom-living Foraniinifera, Echinoid spines, fragments of Mollusc shells 

 (small Gasteropod shells, like Pleurotoma, and Bivalves), coccoliths, rhabdo- 

 liths. Tunicate spicules. 



Residue : 20 per cent, brown, flocculent : — 



Siliceous Organisms (1 per cent), arenaceous Foraminifera, Sponge 

 spicules, Radiolaria. 



Minerals (1 per cent), angular glassy particles, one or two having a 

 mean diameter of 0.06 mm. 



Fine Was/miff s (18 per cent), amorphous clayey matter, with minute 

 particles of volcanic glass, etc. 



No. 25. Station 47, 24th September, 1899. 

 About 7 miles off the south coast of Rangiroa, Paumotu Islands ; 

 depth, 764 fathoms. 



PTEROPOD OOZE : cream colored, slightly coherent. 



Calcium carbonate : 80 per cent, Pteropods, Heteropods, pelagic and 

 bottom-living Foraminifera, Echinoid spines. Coral fragments. Mollusc-shell 

 fragments, small calcareous concretions containing pelagic Foraminifera, 

 Alcyonarian spicules, coccoliths, rhabdoliths. Tunicate spicules. 

 Residue : 20 per cent, brown, flocculent : — 



Siliceous Organisms (1 per cent). Sponge spicules, Radiolaria, arenaceous 

 Foraminifera. 



Minerals (1 per cent), angular particles of felspar and obsidian, mean 

 diameter 0.08 mm., manganese grains, and small cosmic spherule. 



Fine Washings (18 per cent), amorphous clayey matter, with very few 

 minute mineral particles and fragments of siliceous organisms. 



No. 26. Station 62, 26th September, 1899. 

 Lat. 15° 33' S. ; long. 148° 45' W. ; depth, 2267 fathoms. 



GLOBTGERINA OOZE : light brown, with gray patches, slightly coherent. 

 Calcium carbonate: 67.15 per cent, very small pelagic and bottom- 



