342 J. D. Dana—Koch’s Evidence on the Cotemporaneity of 
The Dublin pamphlet of 1843 shows some gain in knowledge ; 
but the author still holds that the Missourium was not solely 
herbivorous; that its tusks curved outward horizontally ; that it 
“waded frequently at the bottoms of the former gigantic rivers 
and lakes of the west ;” that ‘the ribs resembled more those of 
the Reptilia than those of the quadrupeds, being situated half 
reversed in the body [Dr. Koch’s misplacement of them] ; 
be found “in the extreme west of the globe.” 
_ Now this web-footed aquatic animal, capable of feeding him- 
self with his forefoot, was no other than the American Mastodon, 
whose forefeet were as good for putting food into its mouth, or 
ee its teeth, as any Hlephant’s e specimen taken to 
ngland, in 1841, as the Missourium, and which Professor 
Owen says was “ well-known to the public as the Missourt Levia- 
than, when exhibited with a most grotesquely distorted and ex- 
aggerated collection of the bones in 1842 and i848 in the Egyp- 
tian Hall, Piccadilly,” is now (1846), he adds,* an almost com- 
plete skeleton of ‘the Jfastodon giganteus, mounted in strict ac- 
cordance with its natural proportions in the British Museum ;” 
and a representation of it, copied from Owen, is the figure of 
the Mastodon on page 566 of the writer’s Manual of Geology. 
It is pretty plain that Dr. Koch had not been trained to scien- 
tific investigation. This is equally obvious from his two pamph- 
lets on the ‘“ Hydrargos.” 
1) The skeleton exhibited in New York in 1845, and de- 
* History of British Fossil Mammals and Birds, by Richard Owen, F.R.S., etc., 
London, 1846, page 298. : 
i Boston Nat. Hist. Soc., 1845, p. 65. In this Journal, IL, ii, 129 
(1846), where Dr. Wyman’s article is noticed by B. Silliman, Jr., there is a figure 
of the remar kable head 
