360 Zoological Society. 



the lower jaw figured contains six teeth, of which two are much larger 

 than the others. 



H. diversidens. 



EuRYODON, Lund. 



Dr. Lund figures a tooth resembling those of the Armadilloes, but 

 apparently broader in proportion to its antero-posterior diameter. 

 E. latidens. 



Glyptodon, Owen. 



Carapace ovoid, without distinction of shields or bands, composed 

 of small hexagonal pieces with sculptured surfaces ; teeth divided into 

 narrow transverse lobes ; malar bone with a lengthened descending 

 process, placed transversely ; zygoma flat, its glenoid surface elevated, 

 transversely elongate, looking a little backwards ; mastoid propor- 

 tionally small, placed laterally. 



G. CLAVIPES. 



The central tubercle upon each ossicle large, round, or subhexagonal, 

 conspicuous above the surrounding ones, which are small, and more 

 cut up by reticulate depressions. 



G. ORNATUS. 



The central tubercle of each ossicle not conspicuously marked above 

 the rest ; all more finely granular. 



This may possibly be the young of that to which the name reticu- 

 latus has been applied, and which, therefore, I will at present omit. 



G. TUBERCULATUS. 



Ossicles approaching to a square or rhomboidal form, their surface 

 divided into numerous irregular elevations. 



The genus Hoplophoms of Dr. Lund appears to be identical vnth 

 Glyptodon ; he figures two teeth in which the characters of that 

 genus are clearly shown, and several detached ossicles and portions of 

 carapace bearing a general resemblance to the species of Glyptodon, 

 principally to the G. ornatus. He distinguishes two species, the H. 

 Euphractus and H. Selloi. Prof. Owen refers to the H. Euphractus a 

 portion of carapace brought home by Mr. Darwin, and figured in the 

 ' Voyage of the Beagle,' which very closely resembles those afterwards 

 figured in the ' Catalogue of Fossil Mammalia and Aves in the Museum 

 of the Royal College of Surgeons' under the name G. ornatus. 



I am not as yet acquainted with the Pachytherium magnum of 

 Dr. Lund's catalogues. 



Fam. 3. Myrmecophagid^. 



The nasal bones simple, of uniform vndth, emarginated at the 

 ends ; the intermaxillary bones much reduced ; the maxillary bones 

 much lengthened, toothless, the malar process projecting backwards, 

 outwards and downwards ; the posterior palatine foramen single, or 

 wanting ; the malar bone reduced to a slender stylet free at the pos- 



