LIZARDS. 161 
the little caves they will then make, they can hibernate success- 
fully. When the winter weather is exceptionally severe, the 
mound should be covered all round and over with some sacking 
or matting. 
Tuateras ought to have access to plenty of water, which of 
course must not be allowed to get foul. If they are confined 
during the winter months in a heated green house or in a warm 
room, they will not hibernate. It goes without saying that the 
Reptiles should be kept quite clean, but those who have anything 
to do with them will soon see that it is a very easy matter. The 
Tuatera, like the Crocodile and some other animals, has nictitat- 
ing eyelids, which it frequenily uses; but this animal is par- 
ticularly famous for its median, parietal, or pineal eye. It is 
called the ‘“‘ median” eye because of its position in regard to the 
other two eyes; the “ parietal,” from its connection with the 
parietal bone; and the “pineal,” from its association with a 
gland, or small organ, situated on the brain, which resembles in 
shape the cone of the pine. This pineal gland of the human 
being was suggested by Descartes to be the seat of the soul, 
though I believe that suggestion was never seriously entertained. 
Other Lizards, such as Monitors, Slow-worms, Sand-Lizards and 
the like, have this strange third eye, but in none of them is it so 
highly developed as in the Hatteria, and even in this animal it is 
only rudimentary. 
Though New Zealand possesses this famous Lizard, she is 
wonderfully devoid of other Reptiles, with the exception of a 
‘few Skinks and Geckos. I think that at the present time, because 
of the reasons given above, in only two islands of this country can 
these interesting creatures be found. 
