@article {48,
	title = {Descriptions of six new species of shells, and Notes on Opisthostoma decrespignii},
	journal = {Proceedings of the Zoological Society of London},
	volume = {1866},
	year = {1866},
	pages = {445-447},
	chapter = {445},
	url = {http://www.biodiversitylibrary.org/item/90954$\#$page/543/mode/1up},
	author = {H. Adam}
}
@article {49,
	title = {On Opisthostoma, H. Blanford, with Description of a New Species from the Neighbourhood of Bombay, and of the animal and Operculum},
	journal = {Proceedings of the Zoological Society of London},
	year = {1866},
	pages = {447-451},
	chapter = {447},
	url = {http://www.biodiversitylibrary.org/item/90954$\#$page/545/mode/1up},
	author = {W.T. Blanford}
}
