THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 141 



spines, otoliths, Ostracodes, coccoliths, and rhabdoliths ; Sponge spicules, 

 Radiolaria ; minute particles of felspar, volcanic glass, and magnetite. 



Station 239, 9tli February, 1900. 



Three fourths of a mile south of Port Lottin, Kusaie, Caroline Islands ; 



depth, 371 fathoms. 



VOLCANIC SAND or MUD : brownish gray, granulai', incoherent ; appears 

 to have been washed ; contains pelagic and bottom-living Foraminifera, 

 Echinoid fragments and spines, Polyzoa, Pteropods, Heteropods, small 

 Lamellibranchs and Gasteropods, Coral fragments, otoliths, Ostracodes, 

 Tunicate spicules ; large amount of mineral particles (almost 50 per cent 

 of the material), angular, mean diameter 0.3 mm., augite, a decomposed 

 ferro-magnesian mineral (perhaps olivine), volcanic glass, apparently decom- 

 posed felspar, magnetite, and manganese grains. 



Station 242, 14th February, 1900. 



Lat. 6° 55' N. ; long. 152° 40' E. ; depth, 526 fathoms. 



CORAL SAND (?) : gray, very little material ; consisting of one or two Coral 



fragments, measuring about 6 mm. in diameter, Mollusc-shell fragments, 



small valve of an Ostrea, Echinoid spines, pelagic Foraminifera. 



Station 247, 20th February, 1900. 

 Lat. 11° 35' N. ; long. 147° 15' E. ; depth, 3213 fathoms. 

 RED CLAY : very little material, gritty, incoherent, gray brown in color ; 

 containing fragments of pumice, the largest being about 10 mm. in length, 

 much decomposed, some of the vesicles containing zeolitic crystals; angular 

 mineral particles, consisting of volcanic glass, palagonite, pumice, felspai', 

 augite, magnetite, and manganese ; Sponge spicules, one broken pelagic 

 Foraminifer {Sphceroidina dehiscens) observed. 



Station 248, 20th February, 1900. 

 Lat. 12° 51' N. ; long. 145° 46' E. ; depth, 4813 fathoms. 

 RADIOLARIAN OOZE : this is the deepest sounding obtained by 

 the " Albatross," and it would have been extremely interesting to have 

 had a large sample of the deposit at our disposal, but unfortunately very 

 little material was brought up, and it appai-ently does not represent the 

 deposit in situ, being composed almost exclusively of the frustules of one of 

 the largest known Diatoms {Ethmodiscus or Coscinodisci(s), so that one would 



