Reports on the scientific results of the expedition to the Eastern Tropical Pacific in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer "Albatross," from October 1904 to March 1905, Lieut.-Commander L. M. Garrett, U. S. N., Commanding, and of other expeditions of the "Albatross," 1891-1899. XXIX.The Sponges. 3. Hexactinellida. Memoirs of the Museum of Comparative Zoology at Harvard College Cambridge, 42 1915: Unpaginated. mCliclciic [Zoological Record Volume 52]