210 Short Papers and Notes. 
under a large transparent scale, which serves to protect it. All 
the lizards are found to possess this third eye at the crown of the 
head, the other two eyes being in the usual position. The giant 
lizards of geological antiquity were also three-eyed. Some of 
them, like the Mosasaurus, were as much as seventy-five feet in 
length. 
The zoologists tell us strange stories about the wonderful 
forms of life which existed in the times of the Mosasaurus. Yet 
it is well to know that we are living amongst the descendants of 
these three-eyed giants, and that in almost any museum the skull 
of the commonest lizard of to-day shows the socket for the 
accommodation of this extra eye. 
The world of to-day is quite as wonderful as that of the past. 
Like the marvellous in nature of every kind, the creatures we are 
so ready to disbelieve in—except we read of them in books of 
remote travel and adventure—are all around us. Every winged 
creature that flies in the firmament, except birds and bats, and 
untold millions more that creep on the green earth, are equipped 
with two beautiful geometrical windows, in which are hundreds or 
thousands of complete and perfect eyes. 
In the ocean, too, as we have seen, Argus-eyed creatures 
abound. Strange, yet true, is the conclusion at which the 
zoologist has arrived. Animals with more than two eyes, so far 
from being rare and exceptional productions of nature, are 
actually in the majority. They vastly exceed in numbers those 
which are endowed with no more than two. ‘The story of Argus 
is indeed outdone by the story we may read for ourselves in 
Nature’s ever-open page. 
Short Papers and Notes. 
Chalcedony Park. 
R. W. Adams, jun., was the discoverer of the celebrated 
petrified forest of Arizona, now generally known as 
Chalcedony Park. This deposit is situate about 
twenty-five miles south east of Holbrook, in Apache 
County, Arizona. The silicified trees are found 
protruding from the volcanic ash and lava, which is covered 
with sand stone to the depth of 20 or 30 feet. Sections 
