106 ME. G. A. BOULENGEE ON THE EEPTILES 



1. Clemmys lepeosa, Schweigger, 1814. 

 Emys vulgaris, Schlegel. — E. sigriz, Guichenot. 



Carapace dark olive in the young, with an oval orange spot or short longitudinal 

 streak on each shield ; uniform olive, or with traces of the orange spots in the adult. 

 Head olive, sides with orange or yellow streaks or vermiculations, and a round orange 

 spot between the eye and the ear, and a more or less defined ring of the same colour 

 round the latter. Neck and limbs with orange or yellow streaks. These bright 

 markings become very indistinct in old specimens. 



Length of shell 20 centim. 



Inhabits the South of Spain and Portugal, Barbary, and Senegambia. Common 

 throughout Morocco, Algeria, and Tunisia as far as the northern border of the Sahara. 

 M. Lataste's Algerian specimens are from the Wed Zig, near Oran (where he found it 

 in exti-aordinary abundance), L'Arba, Bona, Batna, and Bou-Saada ; he found it in 

 Tunis at Cabes, and his colleague M. Valery-Mayet at Wed Leben and Gafsa. 



Figures : Gray, Cat. Sh. Rept. i. pi. ix., and Proc. Zool. Soc. 1860, pi. xxx., 1869, 

 pis. xxxvii. & 1. 



Order II. SQUAMATA. 



Divided into three Suborders : — 



I. LACEE.TILIA, Lizards. — Nasal bones entering the border of the nasal apertures; pterygoid iu 



contact with quadrate ; mandibular rami united by auture. Pectoral arch or its vestiges 

 present ; clavicle preseut whenever the limbs are developed. Tongue flattened. 



II. RHIPTOGLOSSA, Chameleons. — Nasal bones not bounding nasal apertures; pterygoid not 



reaching quadrate ; mandibular rami united by sutui'e. Clavicle absent ; limbs well developed. 

 Tongue vermiform, projectile. 



III. OPHIDIA, Snakes. — Nasal bones bounding nasal apertures ; mandibular rami connected by 

 ligament. No trace of pectoral arch. Tongue flattened and bifid at the end, and sheathed at. 

 the base. 



Suborder 1. LACERTILIA. 



The Lizards of Barbary belong to seven Families, distinguishable as follows : — 



I. Tongue smooth or covered with vitliform papillDe, feebly nicked at the 



end, not retractile into a basal sheath. 

 Head covered with small scales ; eyes without movable lids, with vertical 



pupil 1. Geckonids. 



Head covered with small scales ; eyes with movable lids, with round pupil . 2. Agamidce. 



Head with symmetrical shields ■ 3. Anguida. 



II. Tongue very long and slender, bifid, retractile into a basal sheath . . 4. Varanida. 



