18 
DESCRIPTIONS OF INFERIOR MAXILLARY BONES 
Species 9. M. elephantoides. Distinguished by the teeth being 
smaller, the denticules more compressed and closer together, and the 
enamel thinner than in the preceding species. The denticules form a 
series of plates, mucronate with small points. There is no apparent 
commissure, nor any central depression, on the contrary, the plates rise 
in the middle. The teeth have ten denticules, with from five to eight 
mammillae. See Geological Transactions of London, Yol. II. Second 
Series, PI. XXXVIII. 
Mr Meyer, in his account of the remains of the Mastodon Arvernen - 
sis, found at Eppelsheim, alludes to another species, the M. turicensis, 
as occurring in the brown coal of the molass formation of Switzerland; 
but by whom this species has been described, or what are its charac¬ 
ters, we have been unable to discover. 
In the third volume of the Memorie della Reale Accademia delle Set - 
enzedi Torino , professor Borson has described a tooth, found at Villanova 
d’Astica, in Piedmont, and which he ascribes to the giganteum. After 
a careful examination of the description and drawing, in the work 
referred to, and of a cast of the tooth, in the Cabinet of the Academy of 
Natural Sciences of this city, we feel persuaded that it does not apper¬ 
tain to that species, the denticules having no longitudinal commissure. 
It probably belongs to a new species, and we would suggest the propriety 
of dedicating it to professor Borson, under the name of M. Borsoni. 
If the differences presented by the specimens we have describ¬ 
ed, be considered as sufficient to indicate a difference in species, or 
should future researches confirm my suspicions on this subject, four 
new species will be added to our Fauna; and we would dedicate the 
first to Baron Cuvier, (M. Cuvieri, PI. XXIY.) to whom science is under 
such immense obligations; the second to Mr Jefferson, (M. Jeffersoni , 
PI. XXY.) to whom the Society is indebted for the valuable specimens 
of this animal in their cabinet; the third to our vice-president, Mr Z. 
Collins, (T. Collinsii , PI. XXVIII.) one of the most zealous naturalists 
of whom this country can boast; and the fourth to our lamented God- 
man (T. Godmani, PI. XXIX.). 
In the Finnel collection there are several jaws, differing in many 
respects from any we have described. There are the portions of two 
inferior maxillary bones belonging to the left side, flattened superiorly, 
and their rami exceedingly thick. They contain one tooth each, with 
