254 Bulletin American Museum of Natural History. [Vol. XIII, 



(Roger, 'oo), received just as tliis paper was going to press. 

 Locality : base of lower Dinotherium Sands, near Augsburg. 

 Very aged skull (Roger, 'oo), found at base of sands, short and 

 massive ; premolars and molars with strong cingulum surround- 

 ing three sides of the crown ; p''-m2 =: 260. Measurements : 



p. I ^ ^ _4_ m. I 2 3 



Length 2y ^ ^s" 37 40 49" 58" 



Breadth 18 35 48 57 56 56 53 



Breadth greatly exceeding length throughout upper grinders ; 

 superior diastema i-p = 85 ; zygomatic arches strong ; occiput 

 as broad above as below ; supra-temporal crests separated by a 

 median groove ; in mid-frontal region bones as thin as paper (an 

 important distinction from A. incisiinwi); nasals a single, compact, 

 laterally compressed bone without trace of median cleft or suture 

 (thus differing from T. aureliane?2sis), thickened at the extremity 

 but not laterally compressed as in T. aurelianensis and T. fossiger ; 

 meatus auditorius open below (resembling R. su?natrensis). I am 

 inclined to regard this as a female skull and to believe that a 

 male would show rugose nasal tips ; in fact, nasals with rugose 

 tips were described and figured by Roger ('85) (Fig. 12, E). 

 This animal shows decided specific differences, but an unmistak- 

 able racial resemblance to both T. aurelianensis and T. fossiger. 

 Other characters of this species observed in Augsburg specimens 

 ^re, lower Jaw : short symphysis ; very short diastema (10); small 

 coronoid process bending sharply forward ; small incisors ; first 

 lower premolars always wanting ; outer face of lower grinders 

 flattened; total premolar series = 1 1 1.5, molar series = 165 ; den- 

 tal formula, y f s f 5 grinding teeth large in proportion to skull. 

 Stuttgart : Teeth measurements : Pm*, breadth, 60, 

 length, 40. Limb measurements : Steinheim collection (Roger, 

 '00, pp. 16-17), humerus, length, 350 to 420 ; radius, 290 to 370 ; 

 femur 390 to 540 ; tibia, 290 to 340 ; metatarsals, I = 108, 

 III =112, IV = 96; these measurements indicate that the 

 limbs are somewhat longer than those of T. fossiger {cf. Os- 

 born, '98, p. 57). The pointed vestigial first lower premolar is 

 l)reserved in one jaw ; lower incisors small and sharply pointed. 

 A maxillary series (Steinheim, No. 6314) is referred by Roger 

 ('00, \y. 14) to this species, mistakenly, I believe, because the 



