MASTODON ANGUSTIDENS. 275 
land, and hitherto exclusively in these deposits, consisting of 
sand, shingle, loam, and laminated clay, containing an inter- 
mixture of the shells of terrestrial, fresh-water, and marine 
mollusca, which extend along the coast of Norfolk and 
Suffolk, and have been so admirably described by Mr. Lyell 
under the name of the ‘‘fluvio-marine crag,” and referred 
to the “* older pliocene ” division of his tertiary system. 
The first representation of any fossil relic of a A/astodon 
from English strata, was given by the father of English Geo- 
logy, William Smith ; it forms the frontispiece of his famous 
4to work, ‘ Strata identified by Organised Fossils, 1816, 
and is a coloured engraving of the natural size of the last 
molar tooth of the upper jaw of the Mastodon anqustidens. 
Cuvier has given figures of the corresponding tooth of 
the Mastodon angustidens, from three individuals of diffe- 
rent ages, and from three different localities, in his ‘ Osse- 
mens Fossiles, 4to. 1821, vol. i. The first ‘ Divers Mas- 
todontes,’ (pl. 1. fig. 5,) is a young tooth, the udder-shaped 
processes of the crown being unworn, and the fangs not 
developed ; from the tertiary deposits at Trevoux: the 
second specimen, (pl. 1. fig. 6,) with the two anterior pairs 
of mammille worn down, is from Peru: the third, (pl. i. 
fig. 10,) having the summits of all the five pairs of mam- 
mille abraded, and the roots of the crown fully developed, 
is stated to have been from the collection of M. Hammer, 
and was most probably a German specimen ; each of these 
molar teeth is referred by Cuvier to his narrow-toothed 
species, “‘ Mastodonte & dents étroites.” 
If the subjoined cut (fig. 97,) of the tooth figured by 
Mr. Smith, be compared with the Cuvierian figures above 
cited, the specific identity will be readily recognised. The 
figures in the ‘Ossemens Fossiles’ are reduced one half, 
and, like Mr. Smith's figure, are drawn in a position the 
TaD, 
