Agassiz 1908. Echini. The genus Colobocentrotus. (Reports on the scientific results of the expedition to the tropical Pacific, in charge of Alexander Agassiz, by the U. S. fish commission steamer "Albatross," from August, 1899, to March, 1900, Commander Jefferson F. Moser, U.S.N., commanding. 11.) Memoirs of the Museum of Comparative Zoology at Harvard College Cambridge, 36 1908: (4 l. + 1-33 + 49 l.)