@article {244,
	title = {The structure and affinities of Herdmania claviformis, the type of a new genus and family of ascidians},
	journal = {Mark Anniversary Volume},
	volume = {12},
	year = {1903},
	pages = {235-261},
	author = {Ritter, W.E.}
}
@article {242,
	title = {Die Ascidien der Arktis},
	journal = {In Romer and Schaudinn, Fauna Arctica},
	volume = {3},
	number = {2},
	year = {1903},
	pages = {93-412},
	author = {Hartmeyer, R.}
}
