XXX. The sponges. In Reports on an exploration off the west coasts of Mexico, Central and South America, and off the Galapagos Islands, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer Albatross, during 1891, Lieut. Commander Z.L. TannePublished in Memoirs of The Museum of Comparative Zoology, Harvard University, in 1904, in volume 30, issue 1, pages 1-164