58 General Notes. - [January, 
first pointed out by Cope, he attempts to explain in another way. 
He regards the supposed astragalus of Le/aps and Pecilopleuron 
as homologous with the tibial epiphysis of Mammalia, rather than 
with the astragalus, and he homologizes the distal tarsal element 
of Dinosauria with the mammalian diaphysis rather than with the 
second tarsal series. 
Professor Owen has recently described an English species of 
laps under the name of Pwcilopleuron minor. 
‘Triassic SAURIANS FROM PENNSYLVANIA.—Additional material 
received from Charles M. Wheatley, of Phoenixville, embraces 
some species of extinct reptiles from the Trias of Pennsylvania 
not included in the last report. (See Proceedings of the Ameri- 
can Philosophical Society, 1877, p. 182.) These are of especial 
interest as introducing to American palzeontological science two 
genera only known heretofore from the European Trias, viz: 
Thecodontosaurus. and FPal@osaurus of Riley and Stuchbury. 
These are called 7: gibbidens and P. fraserianus. A third new 
species belongs to the genus Suchoprion, and is described as S. 
sulcidens. Mr. Wheatley has also obtained additional specimens 
of Suchoprion cyphodon, Belodon priscus, Paleoctonus appalachi- 
anus, and Clepsysaurus wheatleianus. Teeth of the last-named 
saurian indicate a larger animal than the type, and nearly equal 
to the Paleoctonus appalachianus. 
NEW ARTIODACTYLES OF THE UPPER TERTIARY.—Three new gen- 
era allied to Oveodon have recently been discovered in the Loup 
Fork beds of Montana, and been described by Professor Cope 
under the names of Pithecistes, Brachymeryx and Cyclopidius. All 
three are selenodont, have the mandibular symphysis codssified, 
and a deficiency in the number of the incisor teeth. In the first 
two genera there are only three premolars. In Pithecistes the inferior 
canine is functionally developed, there are but one or two incis- 
ors on each side, and the anterior premolars are broader than long. 
In Brachymeryx the premolars are trenchant except the last supe- _ 
rior, which has four columns. The first inferior, is function- 
ally the canine. Cyclopidius is similar to Leptauchenia in its 
dentition, excepting in the presence of only two inferior incisors 
-on each side. The frontal region is occupied by enormous vacul- 
ties, two of which extend between the orbits, and are separated 
by the very narrow nasal bones, which, in the type species C. 
simus, do not extend beyond the lachrymal fosse. The superior 
cial region is excavated, and the cavity is reached from the sides 
by a huge foramen in the facial plate of the maxillary bone. 
second species, C. heterodon is described. The species of the 
other genera are P. brevifacies and B. feliceps. 
Accompanying these was found a species of Blastomeryx (Cope) 
as large as the black-tailed deer, which is called B. borealis. The 
genus Alastomeryx is believed by Professor Cope to be the ances- — 
tor of the existing Cervide, as Dicrocerus is of Antilocapra. 2 
