@article {350,
	title = {<i>Aspidosiphon cylindricus</i>, n.sp.},
	journal = {Notes from the Leyden Museum (Rijks Museem van natuurlijke historie)},
	volume = {20},
	year = {1899},
	pages = {195-198},
	author = {Horst, R.}
}
@article {417,
	title = {Das Blut und die Excretionsorgane von Sipunculus nudus},
	journal = {Stazione Zoologica, Naples},
	volume = {13},
	year = {1899},
	pages = {440-447},
	keywords = {blood, excretion},
	author = {Metalnikoff, S. J.}
}
@article {584,
	title = {On Gephyrean worms from Christmas Island},
	journal = {Proceedings of the Zoological Society of London},
	volume = {22},
	year = {1899},
	pages = {54-57},
	author = {Shipley, A. E.}
}
@inbook {585,
	title = {A report on the Sipunculoidea collected by Dr. Willey at the Loyalty Islands and in New Britain},
	booktitle = {Zoological Results based on material from New Britain, New Guinea, Loyalty Islands and elsewhere collected 1985-1897 by A. Willey},
	year = {1899},
	pages = {151-160},
	publisher = {University Press},
	organization = {University Press},
	address = {Cambridge},
	author = {Shipley, A. E.},
	editor = {Willey, A.}
}
