Pelseneer, P. 1888. Report on the Pteropoda collected by H.M.S. Challenger during the years 1873-76. Part II.--The Thecosomata. Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76, Zoology 23 1-132, pls. 1-2. {Included species}
