@book {18,
	title = {Report on the Polyzoa collected by H.M.S. Challenger during the years 1873-1876. Part 2. The Cyclostomata, Ctenostomata and Pedicellinea.},
	series = {Report on the Scientific Results of the Voyage of the H.M.S. "Challenger", Zoology,},
	volume = {17},
	year = {1886},
	pages = {1-47},
	author = {Busk, G.}
}
@book {17,
	title = {Report on the Polyzoa collected by H.M.S. Challenger during the years 1873-1876. Part 1. The Cheilostomata. },
	series = {Report on the Scientific Results of the Voyage of the H.M.S. "Challenger", Zoology,},
	volume = {10},
	year = {1884},
	pages = {1-216},
	author = {Busk, G.}
}
