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LIZARDS. 135 
excitable, it will make manifest why it has received the above 
name. It isa stoutly-built Reptile, and of a pale olive colour. 
The large triangular head has across ridge of spines behind it. 
Like most of the Ayamide, it has a pair of canine teeth in each 
jaw. The throat is not pouched, but there is a kind of plait 
across the chest which it spreads or erects when angry. The 
long, conical tail is depressed at the base, and is covered with 
keeled, tiled, and unequal scales. 
During the colder parts of the year, the Bearded Lizard should 
be kept in a heated Vivarium. It may be fed upon meat, snails, 
slugs, and occasionally fruit. When in the market it can 
generally be bought at sums ranging from 10s. to £1. 
Hardwicke’s Mastigure (Uromastiz Hardwickii, Fig. 48).—-This 
curious and interesting animal is easily kept in confinement, and 
can generally be procured without difficulty in England for about 
7s. It is both herbivorous and carnivorous, though it is frequently 
described as being entirely a vegetable feeder. In captivity it may 
be provided with pieces of raw meat, cockroaches, mealworms, 
lettuces, and cabbages. It has a curious habit of rearing itself 
against the side of its case, and sleeping supported on its tail. 
As this Mastigure is a native of India, it must be confined in a 
heated Vivarium. At night, or when the temperature of its cage 
has been allowed to sink too low, it will seem to be dead. It will 
then submit to being handled without showing any manifest signs 
of life. Of course this kind of thing is characteristic, more or less, 
of all Reptiles, but it is very noticeable in the Mastigures and the 
Horned Lizards (Phrynosoma) of Texas. 
The Mastigure is an inhabitant of rocky plains, where it lives 
in holes in the rocks or in burrows in the sand. Its strong, 
massive, spiny tail is its weapon of defence. When hot this 
animal is very lively, and if then handled strikes frantic blows 
with that member. It does not bite, at least, such is my own 
experience, but Canon Tristram, speaking of its relative the 
Egyptian Mastigure (U. spinipes), says that when it does ‘‘ bite 
nothing will induce it to relinquish its grasp.”’ 
One of the peculiarities of this and many other Lizards, e.y., 
the Tuatera, is that they will often remain quite motionless for a 
considerable time in the position in which they are placed. For 
