Zoological Society. 357 



tate depressions fewer and smaller behind this area than in front of 

 it ; while in the larger specimen they are all about equal in size. 



It is difficult to compare these specimens with those which retain 

 their natural covering ; but the punctate character seems to belong 

 to the genus rather than to the species, it not being perceptible until 

 the horny scutes are removed : and whether the Tatusia punctata 

 be a species, or merely a large variety of one of the others, it would 

 appear not to be extinct. 



Chlamyphorus, Harlan. 



Plates of the head, the scapular shield and the body forming an 

 uninterrupted series, each a parallelogram, those of the neck smaller, 

 and those of the muzzle irregular ; pelvic shield small, flat, or slightly 

 convex, placed vertically, at right angles to the dorsal armour, and 

 composed of concentric semioval rows of trapezoid plates ; fore-feet 

 with five toes, the medius being the longest, the two inner claws the 

 smallest, and the three outer ones very deep and compressed ; frontal 

 bone with a large thickened process above the eye ; malar bone thin, 

 deep anteriorly, with a rudiment of a descending masseteric process 

 assuming a transverse position ; auditory process bending forwards 

 round the base of the zygoma ; lower jaw with the ascending ramus 

 much elevated, the condyle higher than the coronoid process. 

 C. truncatus. 



Dasypus. 



Head broad behind, ears wide apart, its plates irregular, marked 

 like those of the body ; those of the scapular and pelvic shields ob- 

 long parallelograms, like those of the bands, but becoming penta- 

 gonal or hexagonal towards the neck and croup — all the plates 

 marked with an indented pattern ; bands about six or seven ; fore- 

 feet with five toes, the index nearly as thick as the medius, which is 

 the longest, the claws a little twisted outwards ; maxillary bone ter- 

 minating behind in a strong vertical column formed by the alveolus 

 of the last tooth, and concealing the sphenopalatine and pterygo- 

 palatine foramina ; teeth rather large ; malar process compressed in 

 the antero-posterior direction, suddenly projecting, concave anteriorly ; 

 infra-orbital canal short, pierced through the base of the process ; 

 malar bone angular, with a rudiment of a descending process, com- 

 pressed in the antero-posterior direction ; its zygomatic })rocess deep, 

 extending beneath the zygoma ; palatine bone ascending into the 

 orbit ; no appearance of the ethmoid within the orbit ; pterygoid 

 bones with well-defined hamular processes, bent outwards ; zygoma 

 well-developed, flat ; its glenoid surface slightly convex, reniform ; 

 tympanic bone well-ossified, forming a bulla ; auditory process largely 

 developed ; mastoid bone very broad, placed entirely in the occipital 

 region ; lower jaw deep and thick, its ascending ramus high ; coronoid 

 process largely developed, condyle broad. 



D. SEXCINCTUS. 



Muzzle broad ; plates large, distinct, but slightly indented ; bands 

 six or seven, 110 separate band on the anterior edge of the scapular 



