@book {5426,
	title = {Beobachtungen {\"u}ber Anatomie und Entwicklung einiger Wierbellosen Seethiere.},
	year = {1851},
	month = {1851},
	pages = { - 4o, p 114, 117-118, 121-122 + Tab IV, X, XI},
	address = {Berlin},
	keywords = {Proporus viridis},
	author = {Busch,W}
}
