EXTINCT AMPHIBIA: OF NORTH AMERICA 79 
on three specimens two of which represent the larger part of the animal 
and the other is a large skull in which the characters of the cranium 
have been detected. The two specimens in the National Museum at 
Washington (Nos. 4,472 and 4,473) are impressions of the same indi- 
vidual. It differs from the specimen in the horns being slightly in- 
curved as represented in the drawing. ‘This latter form was described 
by Cope in 1897. 
STEGOPS DIVARICATA Cope gen. nov. 
(Figs. 21, 22) 
The genus Stegops has been erected for the reception of the peculiar 
form described below. ‘This species was first described by Cope as 
Ceraler peton divaricatum* but there 
are very good reasons why the 
form cannot be retained in this 
genus nor can it be placed in 
either the genus Hoserpeton or 
Diceratosaurus. ‘The entire shape 
of the skull, the character of the 
_ horns and the presence of a large 
lachrymal are distinctive characters 
of the new genus Stegops. 
The remains on which the new 
genus reposes consist of the impres- 
sions of a single well-preserved 
skull from the coal mines at 
Linton, Ohio. The chief char- 
Fic. 22.—The outline of the cranial 
elements of Stegops divaricata Cope. 
The lettering as in other figures except 
acters which distinguish the genus I=intertemporal (?). X1. 
will also serve to differentiate a 
new family of Microsauria which may be known as the STEGO- 
PIDAE. The chief family characters are the large lachrymal 
unknown in any of the other species of Carboniferous Amphibia, the 
central position of the orbits, the general form of the skull, and the 
peculiar short divaricate horns. If an intertemporal element is 
present in the skull, which is suggested as a possibility, the family is 
further distinct. 
t Proc. Amer. Phil. Soc., 1885, p. 406. 
