THE GEELONG NATURALIST. 37 
Judging from the formation its flying capacities were probably 
limited to heavy flappings from place to place—but still a distinct 
flight very different from the flying lizard (draco volans) of to-day, 
whose only organ of flight is a membrane which enables the animal 
to take long leaps. The food of the pterodactyl consisted of insects 
and probably fish, which teemed in the warm seas of that period. 
The structure is so paradoxical that scientific men have been at 
a loss where to place them. Some look upon them as birds, as their 
bones have air-cavities, and they have the broad sternum; others 
again regard them as mammals, and others as reptiles. They stand 
at present, I believe, in a distinct and separate class by themselves, 
sole representativs of a class of beasts which has utterly passed 
away. 
MOUNT WELLINGTON. 
Bx Arruur B. F. Wirsow. 
SEVERAL friends and myself left Hobart at six a.m., and reached 
the mountain after a drive of about twelve miles. Here we met 
with luxuriant foliage; native honeysuckle, musk fuchsia, heaths, 
thyme, flowering grass-trees, ferns, mosses and lichens being abun- 
dant, and filling the air with their aroma. The track leading to the 
springs is steep and straight; and flowers, shrubs, and. ferns grow 
in profusion. Ascending this path we reach the springs (about 
2000 feet above sea-level) where we halt for rest and refreshment. 
Looking to the right of the springs the “organ-pipes”’ are plainly 
seen. So called because of the peculiar column-shaped pillars. 
After a sip of the sparkling spring waters we bid farewell to 
two of our friends, who prefer to stop where they are, and re- 
commence the ascent. At length we reach what is called the 
“ploughed fields," where we find a peculiar collection of boulders 
of all shapes and sizes, and for the most part, of granite. Having 
crossed in safety, our chief difficulties are over, and we reach the 
top (about 4000 feet above sea level) at 1.30 pm. After gazing 
for a time at the scene spread before us we descend and reach the 
foot of the mountain in safety, picking up our two friends on the | 
way. : 
The geological formation is of trap or greenstone, and during 
its upheavals it has burst through more recent rocks of sandstone, 
schist, and limestone. At the top of the mount quartz and granite 
are met with, associated with micaceous rocks. 
