30 



The fur of the throat and flanks is uniform brownish-white, that of 

 the latter being sometimes more strongly tinted with brown. All the 

 remaining under-parts have the fur markedly bicoloured, black at 

 the base, with the terminal third brownish-white, varying consider- 

 ably in purity of colour in different individuals. 



In the following table of dimensions, the first column refers to a 

 specimen in Mr. Gould's collection, very kindly lent by him for my 

 use, and from which the foregoing description has been taken : it is 

 labelled "Albany, King George's Sound, May 19th, 1843." The 

 dimensions in the two other columns have been taken from specimens 

 in my own collection, and are also from Western Australia, but the 

 exact locality unknown. 



The comparative description and measurements of the crania of 

 this and the other species will be given in a collected form appended 

 to the description of" the species the last on the list, so as to render 

 their differences more readily apparent : — 



1. 2. 3. 



in. lin. in. lin. in. lin. 



Length of the head and body (about). . 18 2 19 



of the tail 1 4 1 5 1 5 



of the head 7| 8 8 



of the ears 9 9 9 



of the tragus 2\ 3 3 



Breadth of the ears 6 6| 7 



of the tragus 11 \± 11 



Length of the fore-arm 1 4 1 4 1 4 



of the longest finger 2 4 2 6 2 6 



of the fourth finger 1 9 110 110 



of the thumb 2| 3 3£ 



of the tibia 7 1\ 7 



of the foot and claws 3 3| 3} 



of the os calcis 5 6 6 



Expanse of wings, about 9 9 7 9 9 



2. Nyctophiltjs Timoriensis. 



Vesp. Timoriensis, Geoff. Ann. duMus. viii. p. 200. t. 47, 1806 ; 

 Desm. Mamm. p. 146, 1820 ; Fisch. Synop. Mamm. p. 118, 1829 ; 

 Temm. Mon. ii. p. 253, 1835-41 ; Wagn. Supp. Schreib. i. p. 520, 

 1840 ; Schinz. Synop. Mamm. i. p. 175, 1844. 



Vesp. Timoriensisl, Temm. Mus. Leyd. 



Plecotus Timoriensis, Less. Mann. p. 97, 1827 ; Is. Geoff. Guerin, 

 Mag. de Zool. 1832 ; Less. Nouv. Tab. Regn. Animal, p. 23, 1842. 



The forms of this species are so similar to those of the last, that it 

 is needless to enter at greater length into details of description than 

 is necessary to point out the differences between the two. 



In all the specimens I have been able to examine, viz. the original 

 one in the Paris Museum, and three others collected in Australia by 

 Mr. Gould, the ears are strongly sulcated, even more so than is obser- 

 vable in the Plecotus auritus, whilst in the last species they are very 



