406 General Notes. 
In the horses, Hippotherium is placed in the Equida, Dr. 
Lydekker evidently attaching more importance to the presenco! — 
` cementum on the molars, than to the number of toes. Protohip — 
pus is not referred to. Hippidium is united with Equus, a course 
which future discovery may sustain.—&. D. Cope. ta Pe 
THE ANCESTOR OF CorypHopon.—In describing the genus Par — 
tolambda I remarked that it was “ founded on a mandibular ramus, — 
which supports the first true molar, and the last two premolars. — 
The characters of these teeth remarkably resemble those of Cory- 
phodon. * * * It willbe for additional material to demonstrate 
whether this genus belongs to the Amblypoda or Perissodactyla, 
A. considerable part of the skeleton of Pantolambda bathmodon 
having been recently sent me by Mr. D. Baldwin, I am able to 
throw much light on the affinities of tnis curious animal, 
In the first place, the phalanges (with ungual), show that the 
genus is ungulate. Secondly, the astragalus has a large dsw 
facet for the cuboid bone. This proves that the genus aan 
referred to the Taxeopod order. The question as to witii 
belongs to the Amblypoda or the Diplarthra would be decided by 
the carpus, but that part is unfortunately not pres 
Apart from the astragalus, the characters are those of the Con a 
larthra rather than of the Perissodactyla, and it is therefore to 9° 
ilium is narrow. The humerus has an epitrochlear canal: — ; 
blances to the Pantodonta are these: The cervical vertebræ are 
plane and short. The femur has a third trochantti nr 
I propose to place this genus in the Amblypoda for pele T 
next to the Pantodonta, but it cannot enter that sub-orde! | 
ace > baa a E ee a a a p, F 
Astragalus without head; distal facets subinferior. s. ees. c eere t N H 
In the sub-order Taligrada, the single family 7 antol gee 
presents the following characters into 
Superior and inferior molars with the cusps developed 
