322 0. C. Marsh — Restoration of Coryphodon. 



In the meantime, the writer had been investigating remains 

 of the same group from Wyoming and New Mexico, including 

 portions of the original specimen found by Mr. Cleburne, 

 and other material of much interest. It was soon ascertained 

 (1) that all these remains were apparently identical with those 

 of the genus Coryphodon, Owen, as described and figured by 

 him and Hebert ;* and (2) that the geological horizon of these 

 fossils was essentially the same both in America and Europe. 

 An investigation was made of the skull, and especially of its 

 brain-cavity, the latter indicating a brain of very inferior type. 

 The feet proved to be of a primitive form, the maims and pes 

 each having five, very short, functional digits. The remains 

 studied belonged to a new family, named by the writer the 

 Coryphodontidoe. These and other results were brought 

 together in a paper entitled " On some Characters of the genus 

 Coryphodon, Owen," and in it were given figures of the skull 

 and the brain-cavity of a new species, Coryphodon hamahis. 

 This paper was published separately, April 15, 1876, and 

 subsequently appeared in this Journal, vol. xi, p. 425, May, 

 1870. 



Subsequent to the publication of these determinations by 

 the writer, Prof. Cope admitted, in several papers, the refer- 

 ence of these remains to the genus Coryphodon, and the 

 identity of the horizons in this country and Europe in which 

 they were found, but without referring to the above article on 

 the subject. He likewise described in detail, and figured, in 

 1877, what he considered a brain-cast of Coryphodon, but 

 again without any reference to the paper in which, the year 

 before, the writer had given accurate figures of the brain-cast 

 of that genus. In the specimen described by Prof. Cope, the 

 cribriform plates of the brain-case were apparently wanting, so 

 that in the cast figured the olfactory lobes appear to extend 

 far forward, thus giving a wrong idea of the original brain. f 



In the same year, 1877, the writer published a second article 

 under the title, " Principal Characters of the Coryphodontidce," 

 in which he gave more in detail a description of the skull and 

 brain-cast of Coryphodon, with a figure, and also the main 

 facts in regard to the skeleton. The feet of this genus, before 

 practically unknown, were described and figured, and especially 

 compared with those of Dinoceras, which were also repre- 

 sented for comparison.^: In Plate V of the present article, the 

 original figures of the feet of Coryphodon, as given by the 

 writer in 1877, are repeated. The original figure, also, of the 



* British Fossil Mammals and Birds, p. 299, 1846; and Annales des Sciences 

 Naturelles, tome vi, p. 87, 1856. 



f Proc. Amer. Philos. Soc, vol. xvi, p. 616, plates i-ii, 1877. See also Amer. 

 Naturalist, vol. xi, p. 312, and p. 375, 1877. 



% This Journal, vol. xiv, p. 81, plate iv, July, 1877. 



