SUPPLEMENTARY NOTES. 603 
P. 135. The Dinotherium has been spoken of as the largest 
of terrestrial Mammalia, and as presenting in its lower Jaw and 
Tusks a disposition of an extraordinary kind, adapted to the 
peculiar habits of a gigantic herbivorous aquatic Quadruped. 
In the autumn of 1836 an entire head of this animal was dis- 
covered at Epplesheim, measuring about four feet in length and 
three feet in breadth ; Professor Kaup and Dr. Klipstein have 
recently published a description and figures of this head, (see 
PI. 2', Fig. 2.) in which they state that the very remarkable form 
and dispositions of the hinder part of the skull, shew it to have 
been connected with muscles of extraordinary power, to give that 
kind of movement to the head which would admit of the peculiar 
action of the tusks in digging into and tearing up the earth. They 
further observe, that my conjectures (P. 138) respecting the 
aquatic habits of this animal, are confirmed by approximations in 
the form of the occipital bone to the occiput of Cetacea ; the 
Dinotherium, in this structure, afiTording a new and important 
link between the Cetacea and Pachydermata. More than 30 
species of fossil Mammalia have now been found at Epplesheim. 
P. 164. Mr. C. Darwin has deposited in the Museum of the 
Royal College of Surgeons, London, a most interesting series of 
fossil bones of extinct Mammalia, discovered by him in South 
America. I learn from Mr. Owen '' that these include two, if not 
three distinct species of Edentata, intermediate in size, between 
the Megatherium and the largest living species of Armadillo 
{Dasypus Gigas, Cuv.), all similarly protected by an armour of 
bony tubercles, and making the transition from the Megatherium 
more directly to the existing Armadillos, than to the Sloths. A 
still more interesting fossil, is the cranium of a quadruped, which 
must have rivalled the Hippopotamus in dimensions, but which 
has the dentition of an animal of the Rodent Order ; and it is 
worthy of remark, that the largest living species of that order, the 
Capybara, is peculiar to South America. Mr. Darwin has also 
collected fragments of a small Rodent, closely allied to the 
Agouti ; and the remains of an Ungulate quadruped, of the size of 
a Camel ; and which forms a link between the aberrant group 
of Ruminantia to which the Camels and Llamas belong, and the 
order Pachydermata." 
