SAURIA. 57 



4. It is extremely long, worm-like, club-shaped in front, projectile {Vermilingues, 

 Chameleons) : it serves for seizing the prey, and reminds us of the tongue in many Edentata, 

 in the Picidce, and in many tailless Batrachians. 



The atlas is joined to the occiput by one condyle only ; the vertebrae are concave in front 

 and convex behind, with the exception of the Hatteria, from New Zealand. The species 

 with well-developed limbs have a sternum and a symphysis ossium ischii, beside that of the 

 pubic bones. 



The Saurians are oviparous : a few ovoviviparous. 



They have been divided into many families ; representatives of the following occur ia 

 British India : — 



I. EMYDOSAURI. 



Body cuirassed with osseous plates ; vent longitudinal. 

 Tongue short, flat, immoveable Crocodilid^, p. 58. 



II. LACERTINI. 



Body covered with a skin folded into scales, or granular, or tubercular ; vent transverse. 



A. Leptoglossa. Tongue elongate, exsertile, forked. 



Head covered above with numerous small, flat, many-sided shields .... Varanid^, p. 63. 



Head covered above with large symmetrical shields ; no longitudinal fold along 



the sides ; scales of the belly square, in transverse bands Lacertid^, p. 68. 



Head covered above with regular, symmetrical, many-sided shields; a fold 

 along the side of the body ; scales of the belly square or roundish, in 

 cross bands Zonurid.^, p. 74. 



Head covered above with symmetrical, regular shields ; scales of the back, sides, 

 and belly rounded, imbricate, quiucimcial. Nostril in a separate nasal 

 plate SciNciD^, p. 75. 



Head covered above with symmetrical, regular shields ; scales of the back, sides, 

 and belly rounded, imbricate, quincuncial. Nostril in the enlarged rostral 

 plate, with a longitudinal slit behind Acontiadid^, p. 96. 



Head covered above with symmetrical, regidai' shields ; scales of the back, 

 sides, and belly rounded, imbricate, quincuncial. Nostril in the front 

 edge of a small shield, in a notch at the hinder side of the rostral . . . Sepsid^, p. 98. 



B. Pachyglossa. Tongue short, thick, attached to the gullet, not exsertile. 



Scales of the back and sides granular or tubercular Geckotid^e, p. 99. 



Scales of the back and sides imbricate, generally rhombic Agamid^e, p. 120. 



C. Vermilingues. Tongue worm-like, club-shaped in front, very exsertile. 



Scales of the body granular Cham^leonid^, p. 162. 



I 



