666 NATURAL HISTORY MISCELLANY. 
manner in which the costal scutes join the marginal scutes, and 
the sternal scutes one another. The species may be named Bena 
undata. "E 
Dr. Carter’s collection also contains some fragments of bones 
of a large mammal, which are so mutilated as to be hardly char- 
acteristic. A jaw fragment among them, with the retained frag- 
ments of the true molars, would appear to indicate a species of 
Palæosyops much larger than P. paludosus. In absence of other 
evidence, it might be viewed as a species of this genus, under the 
name of P. major. The true molars occupied a space of four and 
a half inches. The last molar measured an inch and seven- 
eighths fore and aft, and an inch transversely in front. 
Dr. Carter had also sent some fossils to Prof. Leidy, among 
which were portions of jaws, with nearly full series of teeth of 
Hyrachyus agrarius. This animal is related to the Tapir, Hyra- 
codon and Lophiodon. The formula of its dentition, is the same 
as in Hyracodon: seven molars, one canine, and three incisors. 
The true molars are like those of Lophiodon, except that the last 
lower one has a bi-lobed instead of a triple-lobed crown. Appar- 
ently the same animal has been indicated by Prof. Marsh, under 
the name of Lophiodon Bairdianus. A fragment of a lower jaw 
containing the last premolar, and the first true molar, indicates 
a larger species of Hyrachyus, which may be named. H. eximius. 
The crown of the last premolar is seven and one-fourth lines an- 
tero-posteriorly, and five and one-half transversely. The true 
molar has measured about eight and one-half lines, fore and aft, 
and six lines transversely, The depth of the jaw fragment below 
the true molar is over an inch and a half. ‘ 
Another fossil is a mutilated incisor, indicating a species of 
Trogosus rather more than half the size of 7. castoridens, which 
may be named T. vetulus. 
A femur of Paleosyops paludosus in the collection, exhibits the 
third trochanter, characteristic of the unequal-toed pachyderms. 
The astragalus of this animal almost repeats that of the living 
tapirs. 
Among the remains of Dr. Corson’s collection, there is the 
greater part of the lower jaw of a large crocodile, but too much 
. broken to attempt to give an opinion in regard to its specific char- 
acter, until it is in some degree mended or restored. 
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