6 3filler — Notes on the Naked-tailed Armadillos. 



furrows between the plates wide and irregular. The majority of the plates 

 of the dorsal armature are provided with from one to four conspicuous, 

 grayish, bristle-like hairs, which spring from the posterior borders and 

 mostly fi-om the corners of the plates ; when from the posterior edge, 

 away from the corners, each hair stands in a distinct excavation or scallop. 

 These bristles are most conspicuous on the sides of the body, where they 

 are often 15 mm. in length. 



Tail about one-half as long as body armature, the scales arrangeil in 

 about 10 rows ; longest scales (near base of tail) oval, about 4 mm. long 

 and half as broad ; most of the scales on dorsal surface of tail with 1-3 

 short bristles springing from posterior edge. 



Skin of belly with transverse rows of well-developed scales, the rows 

 about 7 mm. apart ; each scale with a tuft of 4-6 appressed bristles spring- 

 ing from its posterior edge, the scales themselves averaging about 2 mm. 

 by o mm. in size. Outer side of feet and legs covered with large scales 

 (the largest 7 mm. by 9 mm.), from the posterior edges of which spring 

 conspicuous tufts of bristles. 



Skull triangular in profile, the facial line little broken by supraorbital 

 swellings or postorbital depression. Zygomata greatly expanded and 

 thickened at middle. 



Tatoua (Ziphila) lugubris (Gray). 



1873. Zipliila lugubris Gray, Hand-List of the Edentate, Thick-Skinned, 

 and Ruminant Mammals in the British Museum, p. 23 (St. Cath- 

 erines, Brazil). 



Crown shields about 33 (30-35), regular in form and bilaterally symmet- 

 rical in arrangement, their angles distinct and sides (usually 5 or 6) 

 straight, those at front of shield large and equal to the others in deflnite- 

 ness of form. Each cheek with about 20 small, irregularly scattered scales. 

 Ears pointed above, the lower lobe very slightly developed, the resulting 

 form of conch not at all funnel-shaped. A short high ridge on inner 

 side of conch above and in front of meatus. Internal surface of ear 

 naked. p]xternal surface of ear naked except for a row of scales, each 

 about 1 mm. in diameter, along entire external border of conch, and a 

 secondary row 7 mm. in length extending downward from slightly de- 

 veloped notch between upper and lower lobes. 



Rough i>eriphery of plates of body armature inconspicuous, the smooth 

 central portion generally Hat and polished. Scapular shield consisting of 



7 or 8 rows, the longest of which contains about 28 plates. On neck in 

 front of scapular shield are two or three rows (the longest containing 

 about S plates) of irregularly lenticular, widely spaced plates, the rows 

 not imbricating. Dorsal rings 10, the longest consisting of 2(5-27 plates. 

 Pelvic shield containing 10 rows, the longest with about 25 plates; the 

 furrows between the plates narrow and regular in outline. The majority 

 of the j)lates of the dorsal armature are jirovided with one or two small, 

 very inconspicuous bristles growing from the extremities of the posterior 



