1876.] Proceedings of Societies. 573 
Specimens exhibited of the dental armature of the roof and floor of 
the mouth of eagle rays were referred to extinct species under the names 
Myliobates majester and M. mordax, the former having been one of the 
largest of its kind. Similar specimens from the eocene marl beds of 
Monmouth and Burlington counties, N. J., were referred to species with 
the names of Mylidbates fastigiatus and M. jugosus. 
Professor Leidy further directed attention to a specimen of the snout 
of an extinct cetacean, which he had recently observed among some 
fossils from the Ashley beds in the Smithsonian collection of the gov- 
ernment department of the Centennial Exposition, and which had been 
obligingly loaned to him for description by Mr. W. P. Blake. The 
specimen, two and a half feet in length, had the density of ivory, and 
indicated one of the largest of the little-known family of the ziphioid 
whales. It was referred to a new genus and species, with the name of 
Proroziphius macrops. 
The other fossils are of the giant sloth, the Megatherium, presented 
by Mr. George T. Lewis, of this city. ‘These were also found in the 
Ashley deposits, and are probably the remains of animals which became 
mixed in marshes after the elevation of the Ashley deposits above the 
ocean level. 
June 6th. Professor Cope spoke of the structure of the foot in cer- 
tain eocene unguiculate mammals. The name Creodonta was proposed 
for the group. The peculiarities of eocene forms, allied to the lemurs, 
Were described, and other groups were defined under the names Meso- 
donta, Insectivora, Tillodonta, and Tæniodonta. These were collectively 
aced under the head of Bunotheria. 
Mr. Meehan remarked on the subject of cross fertilization of plants 
and fertilization by insect agency. 
June 13th. At the recent meeting of the Academy, Professor Cope 
called attention to certain fossil remains from: the Rocky Mountains. 
The physical peculiarities of the region in which they were found were 
described, mong the specimens were fragments of limb bones indicat- 
ing an animal of considerable size, which was probably allied to Laby- 
Minthodon or some other huge batrachian. The name Dystropheus 
"emale was proposed for the form indicated, which is particularly in- 
teresting as being the first vertebrate found in the trias of the Rocky 
Mountains, 
_ June 25th. The members of the Botanical Section reported the hold- 
Zoa meeting for organization and the election of the following 
h 
Director, Dr. W. S. W. Ruschenberger ; vice-director, Thos. Meehan ; 
conservator, C. F. Parker; recorder, Isaac Burk; treasurer, Jose O. 
himmel ; secretary, Dr. Leffman. ; 
Dr. Leidy again called attention to the remains of fossil whales from 
the Ashley River deposits and exhibited another specimen from the Cen- 
