-it was wanting. Strangest of all, he informs us that the frontal 
FOSSIL MAMMALS OF THE ORDER DINOCERATA. 153 
1872, Professor Cope being present. The assertion that it is 
“t exceedingly probable that the tusk of the mastodon and elephant, 
regarded as an incisor by Cuvier, is really a canine,” needs no 
refutation. If Professor Cope will examine the skull of a young 
elephant, he will probably find that Cuvier was right after all. 
These specific points against his work, Professor Cope has not 
answered. He has, however, endeavored to break the force of my 
criticism by a general denial, which evades the main issue between 
us. He says, in substance, that one species of Hobasileus, or 
rather, one of the five individuals on which this species was based, 
is different from one of my species. This, however, if established, 
would not materially diminish the list of his errors on this subject. 
Professor Cope distinctly included in his group of supposed Pro- 
boscidians the genera Dinoceras and Uintatherium, thus mistaking, 
as I have already shown, both their characters and affinities. Prof. 
Cope states, moreover, that I have not seen his Eobasileus. This 
is true ; nevertheless, I will venture, with due diffidence, to express 
my belief that he is mistaken in regard to several important char- 
acters of this genus; and I have a suspicion that, when carefully 
studied, it will turn out an orthodox member of the Dinocerata, 
and, not unlikely, a near relative of Tinoceras. ee 
Professor Cope reasserts, likewise, that the descriptions he has 
given are correct. This, however, is impossible; unless, indeed, 
this mythical Kobasileus, under the Professor’s domestication, has 
changed its characters more rapidly than Darwin himself ever 
ed for the most protean of species. Professor Cope has 
ed distinctly that this genus had upper incisors, but no ca- 
next, that it had canines, but no incisors; and finally, that 
it has one incisor and one canine. He has said, also, that the 
nasal bones were greatly elongated; and again, that they were 
very short ; that the spine of the tibia was obtuse; and next that 
sinuses of Eobasilews are in the squamosal region, : and that M 
premaxillary i is a trenchant tusk ! al | al 
in the Arabian Nights and not i in ne cesses A of modern so 
Yale — Feb. 15, 1873. : one 
ee 
: Be: ‘EXPLANATION OF PLATES. 
