DISCOVERY OF THE TITANOTHERES AND ORIGINAL DESCRIPTIONS 



185 



The specific characters are more fully given on 

 page 351 of this monograph. 



Etymology. — "The specific name refers to the high- 

 crowned piercing canine." 



Figure 127. — Type (holotype) of Telmaiherium? altidens 

 Lower jaw. Am. Mus. 2025. After Osborn, 1908. One-sixth natural size. 



Present determination. — The species is probably 

 valid. The generic reference is somewhat less certain. 

 (Seep. 351.) 



Protltanotherium superbum Osborn, 1908 



Cf. Protitanotherium superbum Osborn, this monograph, page 379 



Original reference. — Am. Mus. Nat. Hist. Bull., 

 vol. 24, p. 615, fig. 19, 1908 (Osborn, 1908.318). 



Type locality and geologic Jiorizon. — Uinta Basin, 

 northeastern Utah; Diplacodon-Pi'otitanotherium-E'pi- 

 Jiippus zone (Uinta C) ; probably higher levels. 



Holotype. — A well-preserved lower jaw with denti- 

 tion (Am. Mus. 2501). (See fig. 128.) 



Specific characters. — Osborn writes: 



Pi-m3, 318 millimeters. Canines in males very robust; pi 

 double fanged; postoanine diastema abbreviated; premolar 

 series relatively abbreviated; p2 with very large talonid and 

 crescentic protoconid; ps, p4 with talonid heavy and promi- 

 nent — that is, submolariform — but no entoconid. Ma with 

 hypooonulid sharply constricted off at base. 



Etymology. — superbum, haughty, arrogant. "The 

 name is given in reference to the great size and pre- 

 sumed power of this Uinta titanothere, which con- 

 siderably exceeds that of the smaller [lower] 

 Oligocene titanotheres." (Osborn.) 



Present determination. — The species is 

 probably valid. The generic reference is 

 somewhat less certain. (See p. 379.) 



Telmatherium? incisivum Douglass, 1909 



Cf. Sthenodecies incisivus (Douglass), this mono- 

 graph, page 354 



Original reference. — Carnegie Mus. Annals, 

 vol. 6, No. 2, pp. 305-307, text figs. 1, 2, 3, pi. 

 13, fig. 1, 1909; "issued November 6, 1909" 

 (Douglass, 1909.1). 



Type locality and geologic horizon. — Uinta 

 Basin, Utah, about 3 miles northeast of well 

 2, from "a thick deposit of sandstone and 

 small gravel evidently of stream origin, near the mid- 

 dle of horizon B." Near the summit of Eohasileus- 

 Dolichorhinus zone (Uinta B 2). Discovered by Mr. 

 J. F. Goetschius. 



101959— 29— VOL 1 15 



Type. — A skull, lacking the ends of the nasals 

 (Carnegie Mus. 2398). (See figs. 129, 130.) 



Specific characters. — Douglass writes: 



I think that this skull represents a different genus 

 from Telmatherium, but I prefer to place it provi- 

 sionally here rather than establish another genus. The 

 skull is broad and short, but not high. The forehead 

 is broad and flat. ' The premaxillaries are oblique, 

 not transverse. The face is short and concave. 

 Apparently there are vacuities anterior to the orbits. 

 Beneath these there is a rounded angle on the malar, 

 but there is no flattened shelf beneath the orbit. The 

 zygomatic arch is spreading and moderately heavy. 

 The sagittal crest is quite high and thin. The 

 superior wings of the occiput are also thin. The brain 

 case^is small; the outward-projecting zygomatic proc- 

 esses of the squamosals shelf -like and broad anteropos- 

 teriorly. The paroccipital processes extend laterally 

 and are continuous with the paramastoid processes 

 posterior to the external auditory meatus and the postglenoid 

 process. The anterior portion of the opening of the posterior 

 nares is between the anterior portions of the last molars. 

 The teeth increase quite regularly in size from p2 to m'. The 

 premolars have heavy cingula. The deuterocones on p" and 

 p^ are oblong anteroposteriorly, while that on p* is high and 

 conical. 



Measurements [Douglass] 



Millimeters 



Length of skull, basal 490 



Width of skull 330 



Length of dental series 295 



Length of molar-premolar series 212 



Transverse diameter of i' 21 



Anteroposterior diameter of i' 22 



Transverse diameter of i^ 27 



Anteroposterior diameter of i^ 25 



Transverse diameter of i' 22 



Anteroposterior diameter ofi^ 25 



Transverse diameter of canine 24 



Anteroposterior diameter of canine 27 



Transverse diameter of p2 22 



Anteroposterior diameter of p^ 20 



Transverse diameter of p^ 30 



Anteroposterior diameter of p^ 24 



Transverse diameter ofp* 37 



'T\ Anteroposterior diameter of p"" 27 



Figure 128. — Type (holotype) of Protitanotherium superbum 

 Lower jaw. Am. Mus. 2501. After Osborn, 1908. One-sixth natural size. 



Anteroposterior diameter ofm' 44 



Transverse diameter of m^ 53 



Anteroposterior diameter of m' 46 



Transverse diameter of m^ 53 



Anteroposterior diameter of m' 46 



