130 EDENTATA. 



40066. The imperfect left ramus of the mandible ; from Buenos 

 Ayres. This specimen accords with the one figured by 

 r, op. tit. pi. xviii. Purchased, 1866. 



Some of the following specimens may perhaps be specifically distinct. 

 All are from Buenos Ayres, and, unless otherwise indicated, 

 belong to the Bravard Collection. 



40675. The left humerus, wanting the distal extremity. This bone- 

 apparently agrees very closely with the example figured 

 by Burmeister, op. cit. pi. xxi. fig. 1. 



43237. The left ulna, agreeing very closely with the specimen 

 figured by Burmeister, op. cit. pi. xxi. fig. 3. 



Presented by Senor L. J. Fontana. 1871. 



32501. The imperfect sacrum and pelvis. This specimen agrees 

 very closely in size with the sacrum figured by Burmeister, 

 op. cit. pi. xx. fig. 1. 



37307. The right femur. The distal half agrees very closely with 

 the imperfect specimen of the corresponding bone figured 

 by Burmeister, op. cit. pi. xxi. fig. 2. In Burmeister's 

 restoration of the proximal half, the great trochanter is 

 represented as not extending above the level of the head, 

 but in the present specimen it does so to a considerable 

 extent. 



43250. The right calcaneum of a smaller form. 



Presented by Senor L. J. Fontana, 1871. 



43412. The three phalangeals of the second digit of the left pes. 

 These specimens agree precisely with the corresponding 

 digit of the foot figured by Burmeister, op. cit. pi. xxii. 

 figs. 3, 4, 5. 



Hoplophorus, sp. a. 



The carapace is thin, larger than that of H. omatus, and with 

 the scutes smoother. In the dorsal region there are usually eight 

 peripheral disks to each scute, which are polygonal, and frequently 

 coalesce with the corresponding disks of the adjacent scutes. The 

 intervening grooves are well-marked, the rosettes very distinct, and 

 the peripheral disks of relatively large size ; the central disks of 

 the scutes are not depressed, and are polygonal in form. It is 

 possible that the caudal sheath referred by Owen to Olyptodon 

 clavipes may belong to this form. 



Hab. South America (Argentine Republic). 



