2 Miller Notes on the Naked-tailed Armadillos. 



ing no reference to his previous subdivisions, and describing the small 

 hitfjudtiii as a new species, 'A". latifOftfis.' Another small armadillo, which 

 he regarded as the representative of a new genus, he described under the 

 name Zip)iil<t ln</til>riH. 



Not until 1S91 was the fact recognized that the name Xenurus is unten 

 able fora mammal. Then Ameghino pointed out the long-standing error, 

 but overlooking Gray's Tatoua, proposed as a substitute for Xenurus the 

 new name Lysinrn.n. 



In this course Ameghino has recently been followed by Trouessart, 

 who refers the naked-tailed armadillos as a whole to Lysiurus, and places 

 under it as a subgenus Gray's Zi/>ltll, notwithstanding that the latter 

 was named eighteen years earlier. 



The little known Zl pi ilia layubris has been a source of continual uncer 

 tainty, though since Gray, most writers, Trouessart excepted, have agreed 

 in regarding it as very doubtfully distinct from 'Xenurus' hispidus, an 

 animal much better represented in collections. It is, however, in 110 way 

 closely related to Tatoua hispida, but a distinct species, the representative 

 of a well-marked subgenus, for which, of course, the name Ziphila is 

 available. 



2. THE GENUS TATOUA AND ITS SUBGENERA. 

 Genus TATOUA Gray. 



1830. Xenurus Wagler, Natiirl. Syst. der Amphibien, mit vorang. Classif. 

 der Saugeth. und Vogel, p. 36. Type Dasypus gymnunis Wied 

 D. unicinctus Linnaeus. (Not Xenurus Boie, 1826.) 



1865. Xenurus Gray, Proc. Zool. Soc. London, p. 377. 



1865. Tatoua Gray, Proc. Zool. Soc. London, p. 378. 



1869. Xenurus Gray, Catal. Carnivorous, Pachydermatous and Edentate 

 Mammalia in the British Museum, p. 383. 



1869. Tatoua Gray, Catal. Carnivorous, Pachydermatous and Edentate 

 Mammalia in the British Museum, p. 384. Type Dasypus unicinc 

 tus Linnaeus. 



1873. Xenurus Gray, Hand-List of the Edentate, Thick-Skhme'd and Bu- 

 minant Mammals in the British Museum, p. 21. 



1891. Lysiurus Ameghino, Revista Argentina de Hist. Natural, I, p. 254. 

 Type Dasypus unicinctus Linnaeus. 



1898. Lysiurus Trouessart, Catal. Mamm. tarn vivent. quam foss., p. 

 1146. 



Type species. Tatoua unicincta (Linnaeus). 



g g g g 



Characters. Teeth gHg = 32 to g^ = 36, subcylindrical in form, the 



last about opposite middle of zygomatic arch and some distance in ad 

 vance of posterior border of palate ; tail long, covered with minute, thin 

 widely spaced plates ; claws on front feet very greatly developed. 



