ZOOLOGY 
HE present state of Zoological Science gives the original 
JL divisions of which the animal kingdom is composed; 
they are as follows: 
Vertebrates — The highest and most important branch of the 
animal kingdom, embracing all animals that have a back¬ 
bone. 
Mollnsca — Are animals which have soft bodies enclosed 
in a muscular skin, the majority being protected by a shell, as 
the oyster, mussels, cuttle fishes, snails and slugs. 
Articulates — Are jointed animals, comprising crabs, lob¬ 
sters, worms and insects. 
The term Zoology includes the whole of the animal kingdom, 
besides which different departments have received particular 
names as Ornithology, for birds; Ichthyology, for fishes; Ento¬ 
mology, for insects and Conchology, for the soft-bodied animals. 
The Vertebrates include all animals which have a bony or 
cartilaginous axis, called spinal column. Our Zoological col¬ 
lection is only represented by the first division, namely, the 
Vertebrates, which comprise five great classes, as follows: 
First, Mammalia , all those animals which suckle their young 
by means of breasts. 
Second, Aves, or birds. 
Third, Reptilia , comprising animals that creep, as serpents, 
lizards and turtles. 
Fourth, Batrachia , animals resembling both reptiles and fish 
but which are destitute of scales, as frogs, toads, salamanders 
and newts. 
Fifth, Pisces , or fishes. 
