Notes on the Naked-tailed Armadillos. 



4. COMPARISON OF TIIRP:E SMALL SPECIES OF TATOUA. 

 Tatoua (Tatoua) hispida (Burmeister). 



1854. Dasypus hispidus Burmeister, Syst. Uebers. der Thiere Brasiliens, 

 1st Theil (Mammalia), p. 287 (Lagoa Santa, Brazil). 



1873. Xenurus latirostris Gray, Hand-List of the Edentate, Thick-Skinned, 

 and Ruminant Animals in the British Museum, p. 22 (St. Cath 

 erines, Brazil). 



Crown shields about 55 (50-60), very irregular both in form and arrange 

 ment, their 'sides and 

 angles rounded,' none 

 regularly pentagonal or 

 hexagonal, those at front 

 of shield gradually di 

 minishing in size and 

 distinctness. Cheeks 

 covered with thin scales, 

 closely set in distinct 

 rows. Ears rounded 

 above, the lower lobe 

 greatly developed, the 

 resulting form of the 

 conch roughly funnel- 

 shaped, with a 'distinct 

 notch in the periphery 

 in front below, and an 

 other behind above. A 

 long, low ridge on inner 

 side of conch above and 

 in front of meatus. In 

 ternal surface of ear 

 naked. 'External surface 

 densely coated with 

 roundish scales^about 1 

 mm. in diameter. 



Rough periphery of 

 plates of body armature 

 very conspicuous, the 

 smoother central por 

 tion generally irregular 

 and much pitted. Scapular shield consisting of seven or eight rows, the 

 longest of which contains about 28 plates. On neck in front of scapular 

 shield are three rows (the longest containing about 8 plates) of rectan 

 gular, closely appressed plates, the anterior rows regularly imbricating 

 over the posterior. Dorsal rings 9, the longest containing 25 plates. 

 Pelvic shield containing 9 rows, the longest with about 25 plates; the 



FIG. 2. -Head from above: upper figure, Tatoua 

 (Tatoua) hispida; lower figure, T. (Ziphila) centralis 

 (type). % nat. size. 



