264 MAKSUPIALIA. 



and the two outer V-shaped columns either in contact (Dasyurvs) 

 or fused together (Rarcophilus) ; the hinder lohe of the lower true 

 molars of the Peramelidce. is represented by the talon 1 . 



Genus THYLACINUS, Temminck 2 . 



' Dentition : 1. 1, C. {, Pm. |, M. \. The cheek-teeth resemble 

 those of Sarcophilus, but with total absence of the external cusp in 

 the upper, and of the internal cusp in the blade of the lower true 

 molars, and with the talons of the latter well developed. Axis ver- 

 tebra long ; and an entepicondylar foramen to the humerus. 



Thylacinus spelseus, Owen 3 . 

 Syn. Thylacinus major, Owen 4 (in parte). 



This species apparently presents the same relation to the existing 

 Tasmanian T. cynocephalus as is borne by Sarcophihis laniari.us to 

 S. ursinus, but in this case the excess in size of the fossil form 

 seems to have been still more marked. The smaller specimens in- 

 cluded under the present head cannot be distinguished from large 

 male individuals of T. cynocephalus, but it is probable that they 

 belong to the female of T. spelceus, since the existing species exhibits 

 a great difference in the size of the two sexes ; these smaller speci- 

 mens are, however, referred by Owen 5 to the existing species. 



Hab. New South Wales and Queensland. 



The following specimens may be referred to male individuals. 



32306. Fragment of the right ramus of the mandible of a subadult 

 individual, containing the last true molar ; from a cave in 

 the Wellington Valley, New South Wales. The length of 

 the tooth is 0,019, against 0,016 in the corresponding 

 tooth of a large male of the existing species ; it agrees 

 in relative size with the tooth of the present species 



1 The type of lower true molar obtaining in Dasyurus agrees precisely with 

 those of the Proviverridce (v>de Supplement), and also with the lower carnassial 

 of the Viverrida. 



2 Monographies de Mammalogie, vol. i. p. 60 (1827). 



:1 Cat. Foss. Mamm. et Aves Mus. B. Coll. Surg. p. 335 (1845). 



4 ' Extinct Mammals of Australia,' p. 106 (1877). This name is apparently 

 given by inadvertence for T. spelaus ; the mandible represented in pi. v. fig. 8 is 

 apparently drawn from the last three true molars of Sarcophilus laniarius added 

 to the hinder part of a mandible of Thylacinus cynocephalus, 



5 Ibid. p. 106. 



