Tetrorchis Bigelow 1909

Bigelow 1909. The Medusae. (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. 16). Memoirs of the Museum of Comparative Zoology at Harvard College Cambridge, 37 1909: (1-243)