Othnicl Charles Marsh. — Bccchcr. 147 
One general conclusion of much significance was the out- 
come of his researches on the mammals. It was that the 
Tertiary genera possessed very small brains. As a single 
example, Dinoceras may be taken. This animal was but little 
inferior to the elephant in bulk, but its brain capacity was not 
more than one-eighth that of existing rhinoceroses. 
The first Mesozoic mammal in America was described by 
Emmons, m 1857, from the Triassic of North Carolina. 
Marsh, by his extensive discoveries, was enabled to fill up the 
gaps to the Tertiary with many genera and species from the 
western Jurassic and Cretaceous. Probably nine-tenths of all 
the Mesozoic mammals known in the world were described by 
him, and while these remains are of great interest, yet from 
their fragmentary condition they are not of the highest scien- 
tific value, because little is known beyond the jaws and a few 
limb bones. 
In closing the outline of the discoveries made by this inves- 
tigator, one cannot help being impressed with their signal 
brilliancy, their great number, and especially by their unique 
importance in the field of organic evolution. Were all other 
evidence lost or wanting, the law of evolution would still have 
a firm foundation in incontrovertible fact. The study of 
variation and embryology in recent animals gives hints as to 
the truth, but paleontology alone can give the facts of descent. 
Bibliography. 
1861. 
The Gold of Nova Scotia. Amer. Jour. Sci. (2), vol. 12, pp. 395-400. 
1862. 
On the Saurian Vertebr:c from Nova Scotia. Ibid., vol. Zi^ p. 278. 
Description of the Remains of a new Enaliosaurian (Eosaurus 
Acadianus), from the Coal Formation of Nova Scotia. Ibid., vol. 34, 
pp. 1-16, pis. i-ii. 
1863. 
Catalogue of Mineral Localities in New Brunswick, Nova Scotia, 
and Newfoundland. Ibid., vol. 35. pp. 210-218. 
On the Science of the International Exhibition. Ibid., pp. 256-259. 
1864. 
Notice of a new Fossil Annelid (Helminthodes anticiuus) from the 
Lithographic Slates of Solenhofen. Ibid., vol. 38, p. 415. 
