1872.] 3) [Cope. 
If the body of this animal were of usual proportions as relates to the 
skull, it was about the size of the black bear (Ursus americanus). The 
worn condition of the teeth indicates an old animal, and one that had 
lived on hard food. 
EOBASILEUS CORNUTUS. Cope. 
Gen. et sp. nov. 
Established on remains of five individuals of the average size of the 
Mastodon ohioticus. These indicate clearly a form of proboscidian not 
before recognized. The structure of the tibia and ustragalus, clearly 
indicate that the species is not artiodactyle, while the perfectly simple 
femur is not perissodactyle. The posterior part of the cranium, and the 
short stout phalanges are proboscidian. The existence of horns on the 
frontal bones separates it at once from Dinotherium, Mastodon, Stegodon, 
or Hlephas, and indicates a remarkable combination of structure not 
before known to naturalists. The gigantic size of the typical species 
adds to its interest, and shows it to have been the monarch of the remark- 
able fauna disclosed by recent researches in Wyoming, 
The distal extremities of both humerus and femur are flat, the former 
with oblique trochlear face and shallow olecranar fossa. The great tro- 
chanter of the femur is flat and not recurved ; little trochanter wanting. 
Spine of tibia very obtuse ; distal extremity little excavated. Distal 
extremity of phalanges not divided by trochlear ridge. 
‘Articular extremities of vertebrae plane ; the cervicals very short. 
Cranium with vertical occiput with broad convex superior outline. 
Temporal fosse lateral, posteriorly small. Horn-cores obtuse, com- 
pressed, most at base ; direction divergent. 
NuMBER 1. M. 
benath:of horn-cores: (6 inches)... tis. ee. 0.152 
Elevation occiput from foramen magnum.............. -180 
Width across supra-occipital crest.............. RS ree 815 
«of condyles with foramen....... ot a ely 
ts te DaratiaStOld PLOGeSs........... Cha od Pea COST 
NUMBER 2. 
Transverse diameter condyles humerus....... ash istastes (hs .185 
NUMBER 38, 
Diameter extremity tibia (transverse)................ 6386 
& De ‘¢" (antero-posterior)... sc. is. 096 
6 head Pe CULANS VOTING) 4% 6G. occa ace .140 
6 glenoid cavity scapula............ pees sss Se 
Further details of the structure of this animal will be sought for with 
interest. From the manner of its occurrence, it probably went in families 
or herds. 
CROCODILUS CLAVIS. Cope. 
This is a large species with a muzzle of narrowed proportions and 
sufficient depth to give it a broad oval section. The nasal bones appear 
to have reached the nareal orifice. The anterior superior teeth are very 
large, especially the canine. The inferior tooth corresponding is large, 
