This seemed to be true, so long as a genus was imperfectly known, and its species were founded upon a few specimens, that is to say, were provisional.
Honek egia zela zirudien, genero bat behar bezala ezagutzen ez zenean eta haren espezieak ale gutxi batzuetan oinarritzen zirenean, hau da, behin-behinekoak zirenean;