As Bronn gives the length of the ears and tail in the several species of mice as instances, though trifling ones, of differences in structure which can be of no special use, I may mention that, according to Dr. Schobl, the external ears of the common mouse are supplied in an extraordinary manner with nerves, so that they no doubt serve as tactile organs; hence the length of the ears can hardly be quite unimportant.
Bronnek sagu espezie diferenteen belarri eta buztanaren luzera, ezer berezitarako ez diren estrukturako ezberdintasunen adibide gisa, nahiz eta inolako garrantzirik gabeko adibide gisa, ematen duenez gero, nik aipa dezaket, Schöbl doktoreak dioenez, sagu arruntak kanpoko belarriak ezohizko eran nerbioz horniturik dituela, dudarik gabe uki-organotzat balio diotelarik;