346 



ARMADILLO OF THE GENUS XENUBUS—TRUE. 



VOL. XVIII. 



straight edges. The marginal i)Uites are smaller than the others and 

 rounded. Between each pair of plates on the thoracic rings one hair 

 only is exserted. 



The ears are margined with a row of small rounded scales, but other- 

 wise are entirely naked. The feet and outer sides of the legs are 

 covered with somewhat scattered, flat, orbicular scales. The tail has 

 similar flat scales, about 1.5 mm. in diameter, embedded in the skin at 

 regular intervals. From the posterior margin of each scale one hair is 

 exserted. The terminal portion of the tail for about 40 mm. is entirely 

 naked on the upper side. 



On the belly the hairs are in tufts, which are arranged in regular 

 transverse rows. There are about twenty of these rows between the 

 insertion of tlie fore and hind legs. 



The relative size and length of the claws is the same as in the large 

 species, X. unicincius. 



The skull (Plate XI) indicates that the individual is rather young. The 

 nasals are narrowest in the middle, and expanded at the anterior end 

 and also behind. Their posterior terminations are oblique, the frontal 

 extending forward in an angle between them. The frontal itself is 

 greatly swollen and the interorbital constriction is i)ronounced. Tlie 

 supraoccipital is flat. The posterior half of the jugal is much broader 

 than in A^ unicinctus, and its lower margin turns up sharply to meet the 

 squamosal, making nearly a right angle with the anterior half. The 

 basioccipital is narrow between the tympanic bullae. The palate is 

 short, its length behind the tooth row in the median line not more 

 than that of the last two dental alveolae and half of the third, while 

 in A', unicinctus it extends backward a distance greater than the length 

 of the last four dental alveola?. 



The lower border of the mandible is not concave posteriorly. The 

 coronoid process is small, but well formed and somewhat curved. The 

 condyle is concave. 



Dental fornuila, f . 



Dimensions of the skull. 



Measurements. 



Length from upper margin of fora 

 men magnum to end of nasals . . 



Greatest zygomatic breadth 



Mastoid breadth 



Lengthof nasals in Tiiedian line 



Interorbital constriction 



Measurements. 



Breadth of nasals at anterior extremitj 

 Breadtli of nasals at posterior extremity 



Length of palate 



Length of tooth row 



Length from last tooth to end of ptery- 

 goid 



I have little hesitancy in referring this Honduras specimen to the 

 Dasypus [Xennrus] hispidus of Burmeister,' although his types came 

 from Lagoa Santa, Brazil. It agrees thoroughly both in size and in 

 details of structure, except that the nasal bones appear to be somewhat 



1 Syst. tJbersicht Thiere Brasil., 1. Theil, 1854, p. 287. 



