306 TINOCERAS AND ITS ALLIES. 
that no record of them can be found by diligent inquiry. The few 
species at stake in the present case are comparatively of little 
consequence, but the principle involved is all important, and if 
disregarded, scientific nomenclature will become worthless, and 
honest research lose its just reward. 
TINOCERAS AND ITS ALLIES. 
BY PROFESSOR O. C. MARSH. 
Since the article on page 217 of the April Naruratist was 
printed, another pamphlet by Prof. Cope on the same subject has 
been received (March 20th). In this paper, which is dated March 
14th, 1873, and illustrated by four plates, Prof. Cope has at last 
adopted nearly all my views as to the characters and affinities of 
the Dinocerata, as well as most of my corrections of his errors, 
although without giving credit in either case. Unfortunately, he 
still misinterprets the structure of this group on several points, 
and most of his dates are incorrect as before. On nearly every 
page of the paper, moreover, new errors may be detected, a few 
only of which can be corrected here, for want of space. 
lst. Prof. Cope,is wrong in assigning only three sacral verte- 
bre to the Dinocerata, as Dinoceras, the type of the group, cer- 
tainly has four, and the other genera probably as many. 2d. The 
neck in Tinoceras grandis Marsh (or ? Tinoceras cornutus) was 
much more than a foot in length, rather than less, as the cervicals 
in the Yale Museum clearly prove. 3d. Prof. Cope is entirely in 
error in saying that the muzzle in this species could not reach the 
ground by several feet; the animal really having no use for the 
long proboscis which Prof. Cope persists in putting on him. 4th. 
The specimen described as Eobasileus cornutus was fully adult, as 
the teeth show, and ‘the differences between it and the type of Ti- 
noceras grandis may be due to age. 5th. The nasal bones in this 
genus do not form the inner half of the middle horn-cores, but 
only a small portion of the base, the cores being essentially on 
the maxillaries. 6th. The anterior extension of the malar bone 
_ is not in Dinoceras much less than in Perissodactyls. 7th. The 
