132 THE CERATOPSIA. 



Mm. 



Circumference of supraorbital horn core at base 540 



Distance from orbit to apex of supraorbital horn core. 550 



Distance from apex of supraorbital horn to apex of nasal horn. _ 650 



Length of nasal horn core measured along lower side _ 210 



Vertical diameter of nasal horn core at base H4 



Transverse diameter of nasal horn core at base 100 



Circumference of nasal horn core at base 330 



Distance from orbit to posterior borde-r of nasal opening _ _ 250 



Diameter of occipital condyle 84 



Length of dentary _ _ 505 



Length of predentary. _ _ 304 



Length of splenial _ _ _ . 508 



Greatest width of splenial _ 85 



Combined length of first six [seven] cervicals _ _ _ 550 



Combined length of first three [four] cervicals _ 297 



Transverse diameter of anterior end of atlas 105 



Triceratops galeus Marsh. 1889. 



Type consists of a nasal horn core (No. 2410, U. S. Nat. Mus.), Denver beds of Colorado. 



Original description in Am. Jour. Sci., vol. 38, Aug., 1889, pp. 174. 

 Marsh, O. C, Mon. U. S. Geol. Survey, vol. 27, 1897, p. 527. 

 Osborn, H. F., Contr. Canadian Pal., vol. 3 (quarto), pt. 2, 1902, p. 14. 



In the same paper" in which Professor Marsh pro- 

 posed the genus Triceratops he named and described 

 A ^fi^^^hz^^^^^ very briefly the present species. After describing the 



iq%;\ w^f^^~~ z ^''^^ new s P ecies Triceratops flabellatus, which he subse- 



^^L '&^wm M^^^-J^^ quently made the type of a new genus, he continues as 



j_ follows: 



4 



_„,,_, . _, . , , ,, vr n,, n A much smaller species is represented by various remains, probably 



Fig. 111. — Type of Triceratops galeus Marsh, No. 2410. r r J r J 



U. S. National Museum, consisting of nasal horn from the same horizon, in Colorado. In this species the nasal horn core 



core. A, Anterior view; B, as seen from left side. is especially characteristic. It is compressed longitudinally, and its 



One-fourth natural size. apex is pointed and directed well forward. It is on the extremity of 



the nasals and is thoroughly coossified with them. In front, at the 

 base, it shows indications of union with the premaxillaries, but this connection was slight. 



The type specimen was found in Colorado by Mr. G. H. Eldridge, of the U. S. Geological Survey. The known remains 

 indicate an animal about 25 feet in length. 



The extremely fragmentary nature of the material upon which this species was based pre- 

 cludes the possibility of defining it adequately. As will readily appear from an examination of 

 Marsh's brief description, the nasal horn core must be considered as the type of the species. The 

 "various remains " by which according to Marsh the species was represented were undescribed by 

 him. The nasal horn core was the only portion of the skeleton in any way described by Marsh in 

 naming the species. It was sent in with a considerable number of fragmentary dinosaur bones 

 collected by Mr. G. H. Eldridge near Brighton, Colo. The field labels accompanying these bones 

 state that some of the different fragments, at least, were found separated as much as a mile from 

 one another, and there is no information stating just which, if any of them, were found with the 

 nasal horn core. It is clear, therefore, that the diagnosis of the species must rest solely upon the 

 latter element. This is shown here in fig. 111. In form and general character it resembles much, 

 more closely that element in Torosaurus gladius Marsh than in any known species of Triceratops, 

 and it appears quite possible that it may have pertained to that genus and species. From the 

 fragmentary nature of the specimen, however, this is incapable of demonstration. The species 

 should be abandoned. The principal measurements of the type are: Height of horn core, 71 

 mm.; breadth of same at base, 60 mm. 



a Am. Jour. Sci., vol. 38, Aug., 1889, p. 174. 



