248 Mr. Home’s Observations on the Structure of 
being formed immediately under the fangs of the first, as in 
other animals, are peculiarities not met with in any teeth 
hitherto described, except those of the elephant. 
These peculiarities have, however, been ascertained, in the 
course of the present inquiry, to belong to the Sus JEthiopicus ; 
a skull of which, with the teeth, is preserved in Mr. Hunter’s 
collection. The particular species to which it belonged was 
determined, by its exact similarity to a skull, without the grind- 
ing teeth, in the British Museum, marked, in Dr. Solander’s 
hand-writing, Sus JEthiopicus , from Guinea. 
As the grinding teeth of this animal have not been before 
noticed, figures of the head and teeth are annexed, (Tab. 
XVIII. and XIX.) and, as it has been ascertained by Dr. Solan- 
der to come from Guinea, there is reason to hope so curious a 
species of the hog will attract the notice of naturalists, and be the 
means of perfect specimens being introduced into this country. 
From the appearance of the teeth in the perfect skull, the 
animal had probably arrived at its full growth, and only one 
grinder remained on each side of the jaw, consisting of seven 
different processes, cased with bone, similar to those of the ele- 
phant. The grinding surface of those processes which had their 
points worn down sufficiently to show a transverse section, ex- 
posed three oval portions of tooth, surrounded by enamel, in- 
closed in bone; which is more like the tooth of the African 
elephant than the Asiatic, and makes another variety of form of 
these processes. 
The tusks of the Sus JEthiopicus are uncommonly large, and 
in their structure resemble those of the elephant. 
The skull was shown to Sir Joseph Banks, whose readiness 
to forward the labours of those who engage in the pursuits of 
