For the details of these borings, see "The Atoll of Funafuti," Royal Society of London, 1904.
For further information, see J. Stanley Gardiner, The Fauna and Geography of the Maldive and Laccadive-Archipelagoes, vol. i. pt. ii. 1902, p. 172.
Saville Kent, "Great Barrier Reef," 1893, p. 185.
Duerden, Mem. Ac. Washington, viii. 1902, p. 550.
H. M. Bernard, Journ. Linn. Soc. Zool. xxvi. 1897, p. 495.