268 LLOYD'S NATURAL HISTORY. 
stated to be some difference in the form of the unossified | 
spaces in the palate, and in the contour of the lower jaw. As 
in the case of the Zhylacines, the existing Tasmanian Devil 
may probably be regarded as the direct descendant of the 
extinct continental form, dwarfed by the smallness of the area | 
it inhabits. 
Distrivution.—New South Wales and Queen:zland. 
GENUS PROTHYLACINUS. 
Prothylacinus, Ameghino, Rev. Argent. Hist. Nat., vol. i., p. 
312 (1892). 
This and the following genera from the (Miocene) Tertiary 
of Patagonia are provisionally included in the present family, 
where they are placed by their founder. ‘They appear to be 
more or less closely allied to Zy/acinus, and to have no near jf 
relationship to the American Didelphyide. 
Having the same number of teeth as Zzylacinus, and ex- 
hibiting a similar inflection of the angle of the lower jaw, J 
the present genus appears to be mainly distinguished by the § 
lower premolar teeth being less closely approximated to one @ 
another, 
PROTHYLACINUS PATAGONICUS. 
Prothylacinus patagonicus, Ameghino, Rev. Argent. Hist. 
Nat., vol i., p. 312 (1892). 
The single species of the genus appear to have been approxi- 
mately equal in point of size to the existing Thylacine. 
Distribution.—Tertiary deposits of Patagonia. 
GENUS AMPHIPROVIVERRA. 
This name has been proposed by Ameghino to replace Profo- | 
proviverra, which had been previously employed for a totally | 
