142 THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 



feel inclined to call it a Diatom Ooze. There are also many Radiolaria, and 

 small mineral particles, consisting of volcanic glass, felspar, and magnetite. 

 It is probable that the Radiolarian Ooze, found in the deepest sounding taken 

 by the " Challenger" further to the southwest, may extend to this position, 

 but if so, most of the Radiolaria must have been washed out of the tube 

 in process of collection, while the large cylindrical tenuous frustules of 

 Ethmodiscus have remained behind. 



Station 249, 21st February, 1900. 

 Lat. 13° 8' N. ; long. 145° 25' E. ; depth, 2337 fathoms. 

 RADIOLARIAN OOZE(?): very little material; apparently washed ; including 

 one or two pelagic and bottom-living Foraminifera, numerous Radiolaria, 

 Sponge spicules, a few Diatoms, and many volcanic mineral particles, pumice, 

 volcanic glass, palagonite, felspar, and magnetite. 



Lagoon of Niau. 



CORAL SAND (?): pale salmon pink in color, finely granular, incoherent; 

 consisting of Coral fragments, small Lamellibranchs, bottom-living Forami- 

 nifera, and Tunicate spicules. 



Anchorage, Vavau, Fiji Islands ; depth, 18 fathoms. 

 CORAL SAND : grayish yellow, plastic, coherent ; contains large Coral 

 fragments, one measuring 1 by | by | inches, covered with Serpiila, Mollusc- 

 shell fragments, Ostrea 12 by 9 mm., Cerithimn 15 mm. long, pelagic and 

 bottom-living Foraminifera, Echinoid spines, otoliths, Ostracodes, portion of 

 Crustacean's claw. 



1st January, 1900 ; Sea Beach, South shore of 

 Apamama Island, Gilbert Islands. 

 CORAL SAND : white, granular, incoherent ; made up almost entirely of 

 small angular and rounded pieces of Corals and Mollusc-shell fragments, 

 mean diameter about 0.5 mm., Echinoid spines, Tunicate spicules, Alcyonarian 

 spicules ; small fragments of pumice, the largest being 11 by 6 by 4 mm. 



26th September, 1899. Makatea (Aurora) Island, Paumotu Islands. 



Fossils from the third terrace, about 200 feet above high water : — ■ 

 (1) Fragment of Corals, 20 by 15 by 3 mm., converted into calcite ; has 

 almost entirely lost its original structure. 



