1871.] 21 1 [Cope. 
does not represent the long cutting edge of the crown. His descriptions 
of the tooth appear to refer to this genus. Kerr’s specimens are conclu- 
Sive as to the extent of this formidable genus of carnivorous Dinosauria 
to N. Carolina. 
ZATOMUS, Cope. 
This genus embraces reptiles whose teeth are described and figured by 
Prof. Emmons, American Geology, Pt. VI. p- 62, fig. 84. He found them 
associated with radiate osseous plates (probably dermal) which he found 
on one occasion in connection with the cranium of the supposed Laby- 
rinthodont, Dictyocephalus elegans, Leidy. Both the plates and teeth are 
too large to be associated with the latter, and the teeth especially remind 
one of the Dinosauria. Emmons describes a tooth in the following lan- 
guage : 
“‘It is compressed, curved, finely serrate posteriorly, which appears to 
point to the apex, when seen go as to bring into view a slight wrinkle or 
groove at the base of each tooth. Its enamel covers the whole crown, or 
all above the part implanted or inserted. The enamel is finely or minutely 
wrinkled, and at the posterior edge, at the junction of the plates at 
each side, a faint groove remains; and the serra appear like a double 
tow, but near the apex they entirely disappear; the convex or anterior 
edge is smooth. 
‘The tooth appears much like the tooth of a Megalosaurus in miniature, 
though it is less curved. I have found only two teeth of this kind; the 
smallest is half the size of the one figured.’? This size is Om. 022 in 
length ; diameter at base .012. 
In the section given by Emmons, one side of this tooth is a little more 
convex than the others. 
The affinities of this genus appear to be to Teratosaurus and Lelaps. 
From both of these, as well as from Megalosaurus, it differs in the absence 
of serration from the anterior margin, and in the groove in the posterior 
cutting edge dividing it into two appressed serrate edges which disappear, 
near the apex. The species may be called Zatomus sarcophagus. Its 
size about equalled large specimens of the Southern Alligator. 
HypsiBEMA, Cope. 
Char. gen. Proportions of limbs and feet much as in Hadrosaurus. 
The caudal vertebrae elongate and depressed, in the median part of the 
Series, 
The elongate depressed form of caudal vertebra, distinguishes this genus 
from Hadrosaurus. The latter possesses elongate vertebrae near the 
extremity of the series, but anterior to this point, they are first subqua- 
drate in profile, then proximally much narrowed. The form exhibited by 
the known species of this genus is more like that of Hyleosaurus Mant. 
HypsIBEMA CRASSICAUDA, Cope. 4 
The remains on which this species is founded consists of the distal 
extremity of the right humerus, a portion of the shaft of the left tibia, a 
