Tertiary Vertebrata of the West. 473 



disputed, the author claiming to have named it 19th August, 1872, 

 while he finds no earlier date for the Tinoceras of Marsh than the 

 following month ; but Marsh claims to have published his name on 

 the same day. Loxolopliodon has a long compressed head with a roof- 

 shaped muzzle, over which is a bilobed protuberance at the end 

 of the nasal bone. A second pair of horns stands over the orbits, 

 each formed externally from the maxillary, and internally from 

 the nasal bone. Behind this the margin of the temporal fossa rises 

 in a way that is considered to indicate another horn. Three species, 

 L. comutus, L. galeatus and L. spierianus, are distinguished by 

 characters of the horn-cores. 



Loxolopliodon comutus has a narrow cranium four times as long 

 as its middle width. The diverging horn-cores are in front of the 

 middle length, each with a triangular base. The frontal bones 

 descend behind the horns. There is no bony septum between the 

 anterior nares. The teeth are remarkable for the exposure of their 

 slender roots, as well as for their small size. The grinding surface 

 of the first premolar tooth appears to consist of a worn crescent and 

 an inner tubercle, while the other premolars are transversely arrow- 

 shaped. All the molars have three roots. This type was similar ia 

 form and proportion to the Elephant, with somewhat shorter stouter 

 limbs, and a small tail. The neck was a little longer than in Elephants, 

 but shorter than in the Rhinoceros type. The animal stood almost 

 six feet high at the rump, while the height at the anterior limb is 

 estimated at seven feet five inches. The individual from which these 

 measurements are taken may not, however, have reached its full size. 

 Teeth indicate it to have been a vegetable feeder. It is remarkable 

 that the orbits have no distinctive outline, while the eyes were so 

 overhung by the horns that the view was chiefly lateral, for the 

 muzzle and cranial crest obstructed the view in front and behind. 

 This species was found in the bad lands of Wyoming, 8500 feet 

 above the sea. 



Uintatherium has the cervical vertebras more elongated. This genus 

 is regarded by the author as identical with that which Professor 

 Marsh has rendered classical as Dinoceras, though Professor Marsh 

 separates Dinoceras from it as having three instead of four lower 

 premolars. Leidy published Uintatherium in August, 1872 ; Marsh, 

 Dinoceras, in September, 1872. Three species are here described. 

 Another genus, JBathyopsis, is founded on a mandible with the three 

 molar teeth and four premolars constructed on the same pattern. 

 It differs from Uintatherium and Loxolophodon in the much greater 

 vertical depth of the inferior expansion of the ramus of the mandible, 

 along the whole length of which it extends. The inferior molars 

 are constructed on the plan of those of insectivorous and marsupial 

 Mammals, so as to suggest that the animals fed on Crustacea, large 

 Insects, and perhaps thin-shelled Molluscs. 



A third suborder of the Amblypoda named Taligrada is believed 

 to be indicated by a single species of a genus Pantolambda. This 

 suborder is defined chiefly on the characters of the astragalus, for 

 while that bone in the Pantodonta has no head, in this type it has a 



