NOTES 0\ ADSTI;AI.IAN MAMMAI.v' rROftMlToN. 



121 



sipii of tliis lobe or fold in ftisclpe^. Mandible find teetli decidedly moi-e 

 delicate iliaii those of fii.<riiifK in skulls of equal length. The lower 

 molars affoi-d a sti'iking- and consistent difference between the two species 

 in the followino^ character: ou the posterior niar<rin of ni^ there is a small 

 facet or subsidiary cusp (Fic(. -i) f)ressing closely ag'ainst the antei'ior 

 maigin of the following molar, and there is a similar facet on the posterior 

 mar«»-iii of m- ; there is no trace of any such facets on the posterior 

 margins of these teeth of f»4.'r/j»r's (Fig. G). 



F.pimys fiiscipes. 



Fifi. ,T. Upper molar teeth (after Waite). 



Fig. fi. Lower molar teeth of another specimen. 



t'oiitpKrlsoii nf e.fti'ntid rlmrarters witli those of E . ^'/^sY'/y*e^•. — The fur 

 of ((sulnnlis is much thicker, the basal colour lightei', and it is not so harsh 

 to the touch as that of fii-'icipf'.-' \ it has no trace of the yellowish tinge of 

 the latter species. Ears of ('s.n/v// ///.•< longer, reaching to the posterior 

 margin or middle of the eye instead of half waj' to it as in fiiscipes (vide 

 Waite). The tail of fuscipes is noticeably shorter than that of assivu'lis 

 and is consistently shorter than the head and body in the specimens I 

 have examined ; measurements of three specimens given by Waterhouse'* 

 and Waite show the tail to be 57 mm. shorter than the head and body 

 while in a specimen measured by myself, the tail measured from the 

 I'ump, is 30 mm. shorter ; it is thei'efore propoitionately much shorter 

 than the shortest tail of assiviiJis in comparison with its head and body. 

 There are 30 caudal vertebire in the only skeleton of assiviilis examined, 

 counting from behind the two broad sacral vertebrfe articulating with the 

 ilia, and possibly including several pseudo-sacial vei'tebite ; under the 

 same conditions 1 count 27 caudal vertebrjp in a skeleton of ftisn'pes. 



TxiDiijp. — Fj. assiniilix, hitherto considered quite rai'e, was originally 

 recorded fiom the Clarence Uiver, New South AVales, and King Geoige's 



■• Wateihouse — Zool, Voy. Beagle, i. 2, 18.'?9, p. (50, pi. xxv. 



