Sir C. Lyell and Mr. Wollaston have communicated to me a remarkable fact bearing on this subject; namely, that Madeira and the adjoining islet of Porto Santo possess many distinct but representative species of land-shells, some of which live in crevices of stone;
Sir C. Lyell-ek eta Wollaston jaunak gauza aipagarri bat esan didate gai honi buruz, hots, Madeirak eta beronen ondoko Porto Santo irloteak lehorreko molusku espezie asko dituztela, ezberdinak baina errepresentagarriak, eta horietako batzuk harri-arrailetan bizi direla;