290 SOME OF PROFESSOR MARSH’S CRITICISMS. 
the cavern, the height of the column of water, and the heat gen- 
erated below 
With this work and the admirable series of EREE by Mr. 
Jackson (both in sheets * and stereoscopic form, published by Prof. 
Hayden) of some of the finest views in the National Yellowstone 
Park and Colorado Territory, the reader can obtain a yery clear 
idea of the Geyser region, of the springs in course of eruption, - 
and of the falls and basin of the Yellowstone. We see by the 
papers that it is proposed to open roads into the National Park, 
and erect hotels at the Geysers for the convenience of the public. 
ON SOME OF PROF. MARSH’S CRITICISMS. 
BY E. D. COPE. 
I. : 
I have already (in “ The short-footed Ungulata of the Eocene 
of Wyoming ;” Naturalists’ Agency, Salem, Mass.) shown, by fig- 
ures and descriptions, the absence of foundation for Professor 
Marsh’s recent animadversions, and though these latter present 
internal evidence of idiosyncracy which almost disarms reply, yet 
as some of the readers of this journal may not see the above 
essay, 1 make a few specific contradictions of some of his state- 
ments which may be regarded as serious. 
n an article “On the Gigantic Fossil Mammals of the Order 
Dinocerata,” he writes as follows: `‘ : 
“« (1) What Prof. Cope has called incisors are canines, etc.” 
I had determined and stated them to be canines, in the American 
Naturalist, previous to the appearance of this criticism. 
« (2) The stout horns he described are not on the frontals ‘but 
on the maxillaries.” I was the first to determine these bones to 
be nasals, and find that in Hobasilews they compose the inner face 
of the horns to the apex, while the maxillaries form the outer 
face. f 
* Sun Pictures of Rocky Mountain Scenery. By F V. Hayden. The Rocky Moun- 
tain Album. By F. V. Hayden and A. H. Jackson, Photograp her. 
coca paper, p. 18). easing Marsh has since eoniadidicd the former state- 
