434 - LOOLOGY. 
or four hundred have been killed. When wounded they become furious, 
striking from side to side with their long tusks, seizing and breaking asunder 
the weapon with which they are attacked, and at length, placing the head 
downwards between the fore paws, roll themselves like an immense ball 
into the sea.” o 
The walrus was formerly met with along the Atlantic coast of New 
England, and about the year 1650 extensive fisheries were carried on 
along the coast of New Brunswick. Fossil species of the same genus are 
found within the limits of the United States, one of which is described 
under the name of Trichechus virginianus. Others, as it seems, have left 
their remains in the old world. Bik 
In size the walrus surpasses the largest ox, and attains twenty feet in 
length. The body is covered with short yellowish hair. 
Group 3. Pachydermata. 
The group of Pachydermata is a very natural one amongst the Herbivora 
of our days. It includes those hoofed mammals which are not ruminants. 
Among terrestrial animals they are the largest. They are characterized 
by the thickness of their skin, to which their name has reference; most of 
them are bulky and heavily built, even in the species of middling size. 
The clavicle or collar bone is absent: the pachyderms have limbs destined 
to support the body, and not for seizing any object. They are terrestrial 
or semi-aquatic, and constitute the natural ascending transition from the 
Cetacea and Sirenidia. 
Fam. 1. ANOPLOTHERIDZ. This family combines the characters of the 
ruminants and those of the multungulate or many-hoofed pachyderms. 
The skeleton still presents much of the slender and light forms of the two- 
hoofed ruminants. The genera composing this family are all extinct, 
having only existed during the tertiary epoch. The typical forms lived in 
the eocene period, and towards the end of the meiocene they became less 
numerous, disappearing completely during the pleiocene period. 
The genus Anoplother‘um is considered as having some affinities with 
the rhinoceros, the horse, the hippopotamus, the hog, and the camel; and 
indeed this is not at all surprising, for Anoplotherium has preceded all these 
genera in the history of life upon the surface of our globe. They are the 
prototypical or synthetical creation, combining, during the eocene, the 
forms which were to appear distinct at a later date. Anoplotherium has 
forty-four teeth disposed in a continuous and uninterrupted series, a charac- 
ter found nowhere else except in man. Complete skeletons of Anoplotherium 
are preserved in collections ; the feet are provided with only two developed 
toes, aS In ruminants; in some species, however, there are small accessory 
toes. The Anoplotheria were bulky and stout animals possessing a large 
and thick tail, calling to mind that of the otters, whence the opinion that 
these animals were divers and had habits similar to those of the hippopota- 
mus. Remains of two anoplotheria have been found in Paris; the A. com- 
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