Geology and Paleontology. 1107 
read before the International Congress of Geologists of 1878, I 
recorded the probable occurrence of this Jurassic genus of Croco- 
dilia in North America. This supposition has become a certainty, 
as a result of a more detailed examination of material received from 
Mr. O. W. Lucas, of Canyon City, Colorado. This consists of a 
nearly entire skull, with numerous portions of the skeleton, derived 
from the locality which furnished the typical specimens of Cama- 
rasaurus supremus Cope, and other Reptilia. It appears that the 
specimen is specifically identical with one which includes vertebre 
and a few other bones only, described by me as Amphicotytus lu- 
casii,’ from the same locality. The species may be therefore called 
Goniopholis lucasii. 
e superior surfaces of the skull and dormal scuta are rather 
finely and profoundly pitted. The orbits are a little smaller than 
the crotaphite foramina, and each one has a strong supraorbital 
ne, which is also pitted. The muzzle is of moderate length, and 
is proportioned much as in the Nile crocodile. Its extremity is 
neither abruptly expanded nor recurved. The anterior teeth are 
sculptured with coarse, shallow, parallel grooves. Those of the pos- 
terior portion of the maxillary bone have opposite angles at the 
extremities of a transverse axis extending inwards and forwards and 
outwards and backwards, but the crown is not compressed at the 
base, though slightly so at the apex. The posterior nares are nar- 
row, and are divided by a median septum. Their anterior border 
18 Opposite the middle of the palatomaxillary foramen. The ptery- 
goids terminate posteriorly in a wide, free, transverse margin. : 
The Goniopholis lucasii was equal to a two-thirds grown Missis- 
sippi Alligator in dimensions, and its head was of relatively larger 
size. It was smaller than the G. erassidensowrn. 
Measurements. 
Length of cranium on median line.. 
Length from end of muzzle to line of orbits . x 
Length from end of mnzzle to line of erotaphite foramina .310 
ve 
Width of cranium between quadrates inclusi 250 
= ne of cranium 110 
g “ parietal spa .015 
i ‘* interorbital space -040 
2 “ muzzle at front of orbits 110 
: ares .090 
Length of fore part of pseudocanine tooth........:...ccceeee cerseeeeeseeeeees 035 
Width of fore part at base of crown 013 
E. D. Cope. 
AMERICAN FOSSIL CRYPTOGAMIA.—At a meeting of the Biological 
Society of Washington on Nov. 17th, Prof. L. F. Ward read a paper, 
! Comptes Rendus Stenographiques, Paris, p. 146; Vertebrata Tertiary 
of the United States, 1885, p. 26. 
? Bulletin U. S. Geolog. Survey Trans. F. V. Hayden, 1878, p. 391. 
