KO. 2147. Tiro EXTINCT MAMMALS FROM TEXAS— HAY. 115 



The femur measured by Burmeister is, as seen, considerably longer 

 than that of the Texas species here measured. In the upper part the 

 proportions are nearly the same, the length of the bone being made 

 the standard of comparison. However, the width at the middle is 

 somewhat less in G. petaliferus. "Wliile the width across the third 

 trochanter of G. asper is 0.425 of the length of the bone, in G. 

 petaliferus this width is only 0.331 of the length. Likewise, the 

 width across the condyles of G. asper is 0.382 of the length, in G. 

 petaliferus only 0.29. 



The patella of the left leg is present. Its general form is quadrate. 

 Its length is 81 mm. ; its width near the upper end is 75 mm. ; near 

 the lower end 60 mm. The two lines of measurement are not, how- 

 ever, in the same plane, the outer end of the lower one being car- 

 ried somewhat forward. 



A part of each tibia is present, that of the right side (pi. 1, fig. 3) 

 lacking that part of the distal end which was ankylosed to the fibula. 

 The fibulas are represented by a single fragment of each. 



Measurements of the tibiae of Glyptodon petaliferus in millimeters. 



Total length of the bone 



Distance acro33 the articulatory surfaces for the femur 



Fore-and-aft diameter of surface for inner condyle of f emiu* . . . 

 Side-to-side diameter of surface for inner condyle of femur . . . 



Greatest diameter where bone is smallest , 



Width of articulatory surface for astra^galus 



On account of the absence of the fibula and the consequent slight 

 injury to the tibia here described, it is not possible to compare the 

 latter accurately with the same bone of G. asper. The one measured 

 by Burmeister^ had a length of 210 mm., a width of 111 mm. across 

 the upper end, and a width of 96 mm. across the articulation for 

 the astragalus. It is evident that this bone in G. asper was, relatively 

 to its length, a stouter bone than that of G. petaliferus. 



A considerable number of foot bones, including nine ungTial pha- 

 langes, are preserved, but no foot can be reconstructed from them 

 and a description would hardly add anything of value to what has 

 already been published. 



]Mr. Barnum Brown has described^ a new genus and species of 

 glyptodon, Br achy ostr aeon mexicanus. The genus is based for the 

 most part on the form of the carapace. The small part of this pre- 

 served in the specimen which I describe above and its disorganized 

 condition make a comparison with Brown's specimen impossible. 

 Practically the only common parts are three teeth. It seems to me 



1 Anales Mus. Pub., Bnenos Aires, vol. 2, p. 348. 



" Buil. Amer. Mus. Nat. Hist., vol. 31, 1912, pp. 167-177, pis. 13-18. 



