Art. 24 TEXAN PLEISTOCENE VERTEBRATES HAY 3 



haps three animals ; three fragments of the carapace, and a complete 

 femur. 



An important part consists of two fragments of a right horizontal 

 ramus, between which close to 5 mm. only of bone is missing. The 

 anterior portion presents half or more of the symphysis, the lower 

 border of the jaw, and the bottom of the sockets of 5 teeth and a 

 part of the sixth. The hinder fragment offers the horizontal ramus 

 as far as 45 mm. behind tlie last tooth ; the hinder half of the sixth 

 socket, most of the seventh tooth, and all of the eighth tooth except 

 the summit ; also a part of the ascending ramus. The length of the 

 tooth row was originally not far from 192 mm. The first tooth is 

 represented by only the bottom of the socket. It was shorter and 

 narrower than the other teeth, convex on the inner face, concave 

 on the outer, with at least one intercolumnar groove. The second 

 was trilobate, 20 mm. long and 8 mm. wide. The remaining teeth 

 were close to 22 and 23 mm. in length and 14 mm. in width (pi. 2, 

 fig. 3). The forms of these teeth resemble in general those of the 

 teeth of Burmeister's G. asper and G. elongatus^ ; and, as in the 

 species just cited, the symphj^sis reaches the front of the fourth 

 tooth. At the seventh tooth the jaw on the inner face is 65 mm. 

 high and 40 mm. thick. On a fragment of the left side of the jaw 

 the ascending ramus rises 130 mm. above the alveolar border. 



In 1916 - the writer described portions of a glyjotodon found near 

 Wolfe City, Hunt County, Texas, and referred the animal to Cope's 

 G. fetalijerus. The two specimens need to be carefully compared. 

 As regards the skull the two specimens present, as common parts, 

 only one tooth, the sixth, and a fragment of the jaw bearing the 

 ascending ramus and the outer walls of the tooth sockets. The 

 fi'agments of the jaw present no apparent differences. The Sinton 

 tooth is 22 mm. long, 15 mm. wide at the rear lobe, and 13.5 mm. 

 wide at the front lobe. The Wolfe City tooth is 20.5 mm. long, 13.5 

 mm. wide at the rear, and 11 mm. in front. It may be that it be- 

 longed to a smaller animal. However, it is, relatively to the length, 

 narrower in front than the Sinton tooth in the ratio of 54 to 61. 

 On the inner border of the front lobe of the Wolfe City tooth there 

 is a rather deep groove; on the other tooth this groove is very shal- 

 low. It is shallow on the fifth and fourth teeth of the Sinton tooth; 

 missing on the third and eighth. 



The three fragments of the carapace belong above the pelvis. 

 The largest piece consists of 17 polygonal dermal scutes. Its infe- 

 rior surface is traversed by an elevated tract of bone from 50 mm. 

 to 70 mm. in width which evidently was connected with the spines 

 of the sacral vertebrae. It is rough from fracture, without indica- 



» An. Mus. Buenos Aires, vol. 2, 1874, pi. 27, flgs. 3, 4. 

 2 Proc. U. S. Nat. Mus., vol. 51, p. 107, pis. 3-5. 



