@article {WILLIAMS1889,
	title = {{Note on a new species of Ampullaria from the La Plata}},
	journal = {Annals and Magazine of Natural History},
	volume = {4},
	number = {19},
	year = {1889},
	pages = {47{\textendash}49},
	author = {WILLIAMS, J.W.}
}
@article {623,
	title = {On the terrestrial and fluviatile Mollusca of Trinidad},
	journal = {Annals and Magazine of Natural History},
	volume = {17},
	year = {1866},
	pages = {42-56},
	author = {Guppy, R. J. L.}
}
@article {622,
	title = {Descriptions of new species of fluviatile and terrestrial operculate Mollusca from Trinidad},
	journal = {Annals and Magazine of Natural History},
	volume = {14},
	year = {1864},
	pages = {243-248},
	author = {Guppy, R. J. L.}
}
@article {740,
	title = {New non-marine Mollusca from Peru and Argentina},
	journal = {Annals and Magazine of Natural History},
	volume = {13},
	year = {1914},
	pages = {522-528},
	author = {Preston, H. B.}
}
