122 . EDENTATA. 



visionally referred to this species ; from Minas Geraes. 

 This specimen is larger than the corresponding elements 

 of HoplopJiorus meyeri (No. 18941 a), and differs by the 

 direction of the longer diameter of the articular facette for 

 the atlas being longitudinal instead of vertical. 



Claussen Collection. Purchased, 1845. 



The following specimens from the caverns of Minas Geraes agree very 

 closely with the fragment figured by Lund in the ' K. DansJce Vid. 

 Selsk. SJcr.' vol. viii. pi. xi., under the name of Hoplophorus 

 euphractus ; they may perhaps belong either to the present species 

 or to G. dubius, Beinhardt, if the latter be really a distinct species. 

 All the specimens belong to the Claussen Collection. 



18944 a. Several fragments from the anterior half of the carapace. 



18944 b. Several fragments from the posterior half of the carapace. 



Genus D^DICURUS, Burmeister\ 



According to Ameghino, the carapace is composed of very thick 

 articulated scutes without sculpture, but marked by vascular perfo- 

 rations, and is supposed to have been invested by a continuous 

 horny epidermis. The caudal sheath (on which the genus was 

 established) consists of several movable rings and a long tube with 

 its terminal extremity enlarged into a flattened club-like expansion. 

 This sheath is covered with coarse tubercles interspersed with large 

 rough disks, having a radiate sculpture, and to which horny spines 

 were probably attached. The fronto-nasal region of the cranium is 

 flat ; the humerus has an entepicondylar foramen ; and there are three 

 perfect digits in the manus and four in the pes. The genus attains 

 a larger size than any other. 



DsedicTirus clavicaudatus (Owen 2). 



Syn. Glyptodon clavicaudatus, Owen 3. 



Hoplophorus clavicaudatus, Nodot^. 

 Glyptodon giganteus, Series s. 

 Panochthus yiganteus, Burmeister"^. 



^ An. Mus. Buenos Aires, vol. ii. p. 393 (1870-74). 



^ Kep. Brit. Assoc, for 1846, Trans, of Sections, p. 67 {IS'^I).— Glyptodon.- 



3 Loo. cit. 



* Mem. Ac. Sci. Dijon, ser. 2, vol. v. p. 101 (1857). 



5 Coinptes Kendus, vol. Ixii. p. 207 (18G6). 



'^ An, Mus. Buenos Aires, vol. ii. p. 91 (1870-74). 



