SUPPLEMENTARY NOTES. 
599 
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. 
The Author has recently been informed by Professor Kaup, of 
Darmstadt, that an entire head of this animal has been dis- 
covered at Epplesheim, measuring more than a yard in length 
and as much in breadth, and that he is preparing a description 
and figures of this head for immediate publication. 
P. 446. In the conclusion of our chapter on the remains of 
animals of the lowest order, we noticed Ehrenberg’s discoveries 
of the internal organization, and almost universal presence in 
the Air and Water, of microscopic living Infusoria, little expect- 
ing that before this work had issued from the press, they would 
also be found in a fossil state. In the London and Edin. Phil. 
Mao-. Auo-. 1, 1836, p. 158, there is an extract of a letter sent 
by M. Alexander Brongniart from Berlin to the Royal Academy 
of Sciences of Paris, announcing that Ehrenberg has also dis- 
covered the silicified remains of Infusoria in the stone called 
Tripoli (Polierschiefer of Werner), a substance which has been 
supposed to be formed from sediments of fine volcanic ashes in 
quiet waters. These petrified Infusoria form a large proportion 
of the substance of this kind of stone from four different locali- 
ties on which Ehrenberg has made his observations ; they were 
probably living in the waters, at the time when they became 
charged with the volcanic dust, in which the Tripoli originated. 
It is added in this notice that the slimy Iron ore of certain 
marshes is loaded with Infusoria, of the genus Gallionella. 
L’Institut, No. 166. 
END OF VOL. I. 
