1906.] MAMMALS FROM SOUTH-WEST AUSTRALIA. 477 



sides and underside of digits wholly blackish ; in geoffroyi there 

 is generally a whitish tinge on these paints. 



In the skull the only point to be noticed, besides the superior 

 size, is that the buUss are decidedly larger in fortis than in 

 geoffroyi. 



Dimensions of the type, measured in the flesh : — 



Head and body 650 mm. ; tad 350 ; hind foot 63 ; ear 50. 



Skull — basal length 72 mm. 



Type. Male. B.M. No, 6.8.1.340. Original number 1, Col- 

 lected 1 July, 1905, by G. C. Shortridge. 



In the ' Catalogue of Marsupials ' I drew attention to the greater 

 size of the West Australian representatives of the Black-tailed 

 Dasyure ; and now that Mr. Shortridge's specimens fully confirm 

 the difference, I think the animal should have a subspecific name. 

 More detailed skull-measurements are given in the Catalogue. 



In the female sex there does not seem to be so marked a 

 difference between the two forms, but the material available for 

 comparison is at present very imperfect. 



29. Phascogale flavipes leucogastra Gray. 

 S. l-A- ^- ^,3, 5. King River. 



These fresh examples of the West Australian form of Ph. flavipes 

 are very welcome, as the few skins contained in the Museum 

 collection are much deteriorated. Mr. Shortridge's specimens, 

 coming from the rainy south-west district, are of a rather more 

 " saturate " colour than the old skins, but how much these latter 

 have faded it is not easy to say. 



30. Sminthopsis murina Waterh. 



c^ . 1,2,3. King River. 

 " Trapped on marshy ground in Ti-tree scrub." — G. C. S. 



31. Myrmecobius fasciatus Waterh. 

 2 . 1. Arthur River, Wagin. 



32. Tachyglossus* aculeatus ineptus Thos. 

 Abstr. P. Z. S. No. 31, p. 2, May 8, 1906. 



c?. 122, 123, 124. $.125. Parker's Range, Southern Cross. 



A very spinous form, with small brain-case and short snout. 



Coat completely spinous, no haii's perceptible on the vipper 

 surface at all, except the well-marked tuft over each ear. Below 

 also the fur consists wholly of flattened bristles. Colour above 

 more mottled than usual, owing to the large proportion of white or 

 black and white spines. Third hind claw not lengthened, little 

 longer than the fourth, as usual in typical acideatus. 



Skull small, with a fairly broad but not greatly inflated brain- 

 case and very short snout. As a result the index of breadth is as 

 high as in the large Tasmanian T. a. setosus (average of three 



* Not HcUdna. See Ann. Mus. Genov. [2] xviii. p. 621 (1897). 



