LACEETA MCEALIS IN WESTEEN EUEOPE AND NOETH AFEICA. 415 



which the ground-colour appears as narrow areas of a dark olive-grey ; irregular 

 hlack spots and round light dots are present on the upper surface and sides of the 

 tail. 



The type specimen is figured on PI. XXIX. fig. 8, and the upper view of head on 

 PI. XX VIII. fig. 9. 



The narrower head appears to be the only constant character by which this lizard 

 can be distinguished from the Corsican var. hedriagce, but it is sufficient for preventing 

 us, at present, from uniting the two forms. It is also remarkable that the five 

 known specimens agree in having the rostral broadly in contact with the frontonasal, 

 a character which occurs but exceptionally in the var. hedriagce. 



VIL— NORTH AFRICA. 

 (Plate XXIX.) 



Algeria is inhabited by a small form of Lacerta muralis very similar to the 

 Iberian var. locagei, except that the light dorso-lateral streaks are not so close 

 together on the body. Specimens of this form from Oran and Tlemsen have been 

 described as " variete verte " by F. Doumergue, ' Essai sur la Faune herpetologique de 

 l'Oranie,' p. 124 (1901) ; while others, from Mascara, distinguished by the blackish- 

 brown colour of the upper parts, have been named by the same author var. fusca 

 (p. 125), a name already occupied. I have been favoured with the loan of two 

 specimens from Mascara, and I have lately had an opportunity of examining a large 

 number of lizards collected by Mr. Riggenbach in the Tamaruth Valley, Atlas of 

 Morocco, which agree on the whole very closely with the Algerian specimens, and I have 

 given a description of them, with figures, in the ' Novitates Zoological,' 1905, p. 75, pi. ii. 



Specimens which I received long ago from Tangier, through M. H. Vaucher, differ 

 considerably from the preceding, and probably deserve varietal distinction. I 

 propose for them the name var. vaucheri, whilst retaining the name var. locagei Seoane 

 for the other specimens from Morocco and Algeria. A var. tiliguerta has been 

 reported from Tunis, but I have reason to doubt the correctness of the locality. 



Var. bocagei 1 . 



My material consists of numerous specimens from the Tamaruth Valley, Atlas of 

 Morocco (Riggenbach), several specimens from Tlemsen near Oran (J. Anderson), two 

 (types of var. fusca Doumergue) from Mascara, and a few from the following Algerian 

 localities in the Lataste Collection : Plateau de Sersou, Aumale, Setif, Daya, Tebesa. 



The depth of the head, in the tjmpanic region, equals the distance between the 

 centre of the eye and the tympanum. The hind limb reaches the shoulder or the 



1 See above, p. 301. 



vol. xvn. — pact iv. No. 9.— October, 1905. 3 i 



