@article {251,
	title = {Additions to the Mollusca of Northumberland and Durham},
	journal = {Transactions of the Tyneside Field Club},
	volume = {1},
	year = {1848},
	pages = {195-207},
	author = {Alder, J. and Hancock, A.}
}
@article {289,
	title = {On the larval state of Molgula with descriptions of several new species of simple ascidians},
	journal = {Annals of Natural History},
	volume = {6},
	number = {4},
	year = {1870},
	pages = {353-368},
	author = {Alder, J. and Hancock, A.}
}
