22 Annals of the Carnegie Museum. 



Order BRUT A (^EDENTATA) Linnjeus. 



Family STYLINODONTIDtE Marsh. 



Calamadon? Cope. 



(Rept. Vert. Fossils New Mexico, Extract from App. FF, Ann. Rept. Chief of Eng., 



1874, P- 5-) 

 (Plate II, figures 14-16.) 



(No. 1674, Carnegie Museum Catalogue of Vertebrate Fossils.) 

 It is very uncertain to what animal this tooth belongs. It is prob- 

 able that it is the premolar of an animal related to Calaviadon of the 

 Wasatch beds. The tooth had one large and two small roots, one of 

 the latter much larger than the other. These correspond with the three 

 unequal-sized cusps of the crown. The tooth is oblong-suboval in 

 section and probably the long axis of the oval was transverse to the 

 axis of the jaw. The enamel extends downward much farther on the 

 side of the largest cusp, which was probably the external portion of 

 the tooth, than on the other side. The enamel is faintly ribbed, and 

 there are broad vertical convexities, and minute pits, or short, tran- 

 verse striations. The tooth is moderately high, but the cusps are 

 very low, and the triturating surfaces of all are worn. 



mm. 



Antero-posterior diameter of tooth 9.5 



Transverse diameter 14.5 



Height of crown, outer 13. 



Height of crown, inner 7.5 



Order UNGULATA Ray. 



Family PHENACODONTID.F: Cope. 



Eutoprogonia Cope. 



(Am. NaL, XXVII, 1895, p. 378.) 

 (Plate I, figure 4 ; Plate II, figures 12-13.) 



There are several specimens in the collection which are referred to 

 this genus, though I do not know of any teeth which exactly corres- 

 pond to them in form. No. 10 16 (PI. I, Fig. 4) is apparently a 

 fourth upper premolar, though it may be the third of the series. A 

 horizontal section of the tooth is nearly an equilateral triangle. The 

 angles are rounded. The outer pyramidal portion of the tooth is ap- 

 parently composed of two united cusps, one higher and larger than the 

 other. The partial separation of the outer cusp is a condition inter- 



