10 REPTILE GALLERY. 



specimens and a skeleton are exhibited. All their external cha- 

 racters testify to their mode of life ; they are burrowing animals, 

 passing the whole of their existence under ground in loose soil, 

 sand, or ant-heaps. The skin is not protected by either scales or 

 scutes, but divided by circular and longitudinal folds into quad- 

 rangular segments arranged in rings. The colour of the skin is 

 either whitish, reddish, or greyish, without any ornamention. 

 Legs are absent (with the exception of the genus Chirotes, in which 

 a pair of very short fore legs are developed). The head and tail 

 are both short; and the superficial similarity of the two extremities 

 in some of the species has led to the belief that they could progress 

 backwards and forwards with equal facility. Their eyes are quite 

 rudimentary, hidden below the skin ; ear-openings are likewise 

 absent. The Amphisbsenians are inhabitants of hot countries — 

 Africa, America, and the countries round the Mediterranean. 

 About 50 different species are known. 



[Case 18.] Lizards proper (Lacertidae) are confined to the Old World, and 

 found in Europe, Asia, and Africa. They seldom reach a length 

 of eighteen inches (Lacerta ocellatd), and feed on small animals 

 only, insects and worms being the principal diet of most kinds of 

 Lizards. The Common British Lizard is Lacerta vivipara; the 

 Sand Lizard (L. agilis) and Green Lizard {L. viridis) being more 

 locally distributed in the Southern Counties and the Channel 

 Islands, but very abundant in various parts of the continent of 

 Europe. 



[Case 18.1 The Zonuridce include limbed as well as limbless forms; of 

 the latter the Glass Snake, or Sheltopusik {Pseudopus pallasii), 

 common in South-eastern Europe and Western Asia, is an example. 



[Case 18.] The Scincidce or Skinks, recognizable by their round imbricate 

 scales, also include forms in which the limbs are rudimentary or 

 absent. Of the limbless species, the Slowworm or Blindworm 

 (Anguis fr agilis), common in Great Britain, is the best known. 

 The largest forms of this family are Australian, as Cyclodus gigas 

 and nigroluteus, Tropidolepisma, and Trachydosaurus, the last 

 remarkable for their rough scales and short tail, somewhat re- 

 sembling the cone of a fir-tree. A very curiously shaped form, 

 also from Australia, is Silubosaurus (S. stokesii), with its short 

 conical tail armed with dagger-pointed, spinous scales. 



