Le occurs, as in Old Castilian, in words formed with the suffix ellum (castiellu, portiellu), while modern Castilian has reduced Ce to C. E, i, u, post-tonic for a, e, 0: penes (penas), gracies (gracias), esii (este), frenti, (frente), liechi (leche), nuechi (noche), unu (uno), primeru (primero).
Leche shows that the wild Bactrian camel differs from the domesticated breed of central Asia in the following external characters: the humps are smaller; the long hair does not occupy nearly so much of the body; the colour is much more rufous; and the ears and muzzle are shorter.
Dr Leche also institutes a comparison between the skeletons of the wild and the tame Bactrian camel with the remains of certain fossil Asiatic camels, namely, Camelus knoblochi from Sarepta, Russia, and C. alutensis from the Aluta valley, Rumania.
On the latter hypothesis it has been generally assumed that the wild camels are the descendants of droves of the domesticated breed which escaped when certain central Asian cities were overwhelmed by sand-storms. This theory, according to Professor Leche, is rendered improbable by Dr Sven Hedin's observations on the habits and mode of life of the wild camel.