The Land Tortoises are divided into four genera, which Duméril and Bibron again divide into three sub-genera and thirty species. The most interesting species, however, to which we must limit our remarks are--the Marginate Tortoise, _Testudo marginato_; the Moorish Tortoise, _Testudo Mauritianica_; the Greek Tortoise, _Testudo Græca_; and the Elephantine Tortoise, _Testudo elephantina_. [Illustration: Fig. 35.--Testudo Mauritianica.] The Margined Tortoise, which was long confounded with the Greek Tortoise, is found abundantly throughout the Morea, in Egypt, and upon the Barbary coasts. The carapace is oval in form, oblong, convex, and much dilated at the posterior margin, and nearly horizontal; the plastron is movable behind, which is its chief sub-generic character; the tail is thick, conical, and scarcely issues from the carapace. The plates of the disc are of a blackish-brown, presenting towards the centre certain spots of a beautiful yellow colour; the marginal plates are habitually ornamented with two triangular spots, one yellow, the other black. The underpart of the body is of a dirty yellow, with one large triangular black spot upon six or eight of the sternal scales. This Tortoise is of medium size. The Moorish Tortoise, _Testudo Mauritianica_, is commonly found in the neighbourhood of Algiers, and along the coast of Morocco, whence those are sent which are sold in the Paris markets. When shooting in Morocco, scarcely a day would pass without the setters or pointers finding numbers of them, to which they would stand with as much staunchness as game. The scent they emit is so powerful as to be easily detected by a human being. The carapace of this species is also convex; the sternum is also movable behind: it is generally olive-coloured. The plates of the disc are marked with blackish spots, and sometimes with a buckle of the same colour, which covers their circumference on the front and sides. The plates of the plastron, the ground of which is olive, have each a large black spot in the centre. This species is rather smaller than the Marginate Tortoise.