1883.] Proceedings of Scientific Societies. 465 
cended the Paraguay twenty years after the discovery of America, 
reported that they found horses in abundance. He had reason 
to believe that the foot of Orohippus Marsh, did not differ from 
that of Hyracotherium. Specimens collected in the Laramie beds 
by Mr. Wortman strengthened his belief in their Cretaceous age. 
A genus of Mammalia had been discovered by Mr. Wortman, 
which he named Meniscoëssus. Its molar teeth resemble that of 
Stereognathus Ow., of the Oolite. Professor Heilprin stated his 
belief, from a comparison of the Mammalia, that the Nearctic 
should be considered to form a portion of the Palearctic, and pro- 
the name Triarctic to include both. Professor Cope 
dwelt upon the distinctness of the Nearctic reptiles and fishes 
from those of the Palearctic. Dr. Horn said that the coleoptera 
found north of the St. Lawrence were likely to occur also in the 
north of Asia, while those found south of that river were more 
closely allied to those of Mexico. The general character of the 
Japanese coleoptera was similar to that of the eastern United States. 
The Rev. H. C. McCook stated that the distribution of ants sup- 
ported Professor Heilprin’s position, but that there was not the 
same correspondence between the spiders of the two regions. 
Mr. Tryon declared that the northern part of both continents con- 
tained the same genera and even the same species of mollusks, 
but that farther south the differences increased. 
Sera 19.—Dr. H. Allen spoke of the irregularity of the folds 
the hard palate and the assymmetry of the dental arch, and 
the ; in the embryo six regular curves range across 
Palate, but at birth these have become irregular ; the speaker 
aR Ns of Meniscotherium terrerubr@,a genus near Hyrax, and be- 
eas = rosten Condylarthra; the teeth are tapiroid in 
— Professor Lewis presented a paper upon “ Enclosures 
y a oyite,” and Alexis A. Julien an aei the “ Genesis 
mh, ne Iron Ores,” 
— Hon of th Professor Cope presented a paper upon the distribu- 
Wortm.. p atrachia and Reptilia in western North America. Mr. 
-skull of G rew attention to the fact that the museum contained a 
De Leig anis lupus, possessing a third molar in the upper jaw. 
we i Sy mentioned that he knew of an adult man with only 
D and two premolars on each side of each jaw. 
. 
€ ro- 
true molars, Said that he had seen a large dog with four inferior 
