1906.] MAMMALS FROM SOUTH-WEST AUSTEALIA. 475 



22. Bettongia lesuburi Quoy & Gaim. 

 $ . 1, 2. Ai^thur River, Wagin. . 



23. Tarsipes spekser^ Gray. 



05* . 70. $ . ^. King River. . 



" No. 70. Caught in the bottom of a well." 



" No. 2. Had one young in the pouch ; probably just born, 

 being about the size of a grain of wheat." — G. G. S. 



As Mr. Palmer has shown *, Gray's name spenserce has priority 

 of publication over that of rostratus given by Messrs. Gervais and 

 Yerreaux. 



24. Dromicia concinjSta Gould. 

 $.192. Southern Cross. 



25. Trichosurus vulpecula Kerr. 



cJ . 24, 25, 27, 28, 30. $ . 26, 29. Mt. Barker. 



c? . 41, 48, 49, 55, 73, 74. 2-3,4, 20, 36, 42, 45, 46, 47, 66, 

 71, 72. King River. 



" Trapped among Red Gums. Bait, oatmeal." — G. C. S. 



The majority of these specimens have the end of the tail white, 

 thus corresponding with Ogilby's Phcdangista xanthoinis\. 



Mr. Shortridge says that " specimens without the white tip to 

 the tail are considered rare." 



26. ThalacomysJ lagotis Reid. 



Peragole lagotis of the ' Catalogue of Marsupials.' 

 S . 1- Arthur River, Wagin. 

 $ . 134. Parker's Range, Southern Cross. 

 "The tail seems to be slightly prehensile." — G. C S. 



27. IsooDON OBESULUS Sliaw. 



Permneles ohesula auctorum. 



J. 21. $ . 1. King River. 



cf" . 3, 5. $ . 4. Big Grove, King George's Sound. 



cJ . 6. Arthur River, Wagin. 

 " Native name, ' Waint.' 

 " Trapped in marshy country." — G. G. S. 



It appears to me that it would be more in accordance with the 

 modern estimate of the value of genera to subdivide the old genus 



* Index Gen. Mamm. p. 664, footnote (1904). 



t P. Z. S. 1831, p. 135. 



j Mr. Palmer (Index Gen. Mamm. p. 677, 1904) criticises my adoption of the 

 term Thalacomys iovfhis genus on the ground that it is an "obvious misprint" for 

 Thylacomys, which latter was used (but as a nomen nudum) in the ' Athena3um ' two 

 years before Blyth put IViaZacowys in a tenable manner in his 1840 edition of Cuvier. 

 But we ought to be very chary of changing names, supposed to be misprints, unless 

 their obviousness as such is quite clear, and in this case I do not think we are 

 justified in calling Thalacomys a misprint, when it was the second of the two forms 

 to occur, as though it had been " corrected," and was again twice repeated by its 

 author in subsequent editions {cf. Ann. Mag. N. H. [7] v. p. 222, 1900). 



