REVISION OP AUSTRALIAN JERBOA MICE. 
broadening posteriorly. Lacrymal bones unusually large in the type, though 
this may be mainly due to age. Palatal foramina fairly large, well open. 
Anterior end of mesopterygoid fossae narrow, parallel sided. Molars small. 
Incisors more or less orthodont, index of type 70°. Habitat. Cape York, 
North Queensland.” 
Type. — In British Museum. 
I have not seen the type of this species, but the description 
applies perfectly to some specimens of N. alexis except for two 
characters : basal colour of ventral fur and higher incisor index. 
The basal colour of the ventral fur varies in alexis as noted 
above. In some specimens basally grey fur is confined to the 
inner side of the hind limbs, and the colour is so pale that, in a 
dry skin, it is difficult to see ; if the skin be damped, however, 
it at once becomes apparent. The figure given by Thomas for 
the incisor index of the tjipe aquilo is higher than that in any 
of the present series of alexis measured in the manner previously 
described in this paper ; for this reason alone, I have included 
his description. I have no doubt, however, that it will prove 
to be identical with alexis, whose distribution might reasonably 
be expected to extend to the dry areas south of Cape York. 
In this case alexis, which is the later species, would be consigned 
to the synonomy of aquilo. 
Notomys cervinus (Gould). 
Hapalotis cervinus Gould, Pro. Zoo. Soc., 1851, p. 127. 
Thylacomys cervinus Waite, Pro. Roy. Soc. Viet., X, p. 117, 1898, PI. VI. 
Notomys cervinus Thomas, Arm. Mag. Nat. Hist. (9), VIII, p. 541, 1921. 
Ascopharynx cervinus Wood Jones, Rec. Sth. Aust. Mus., HI. p. 3, 1925 ; 
id. Mamin. Sth. Aust., Ill, p. 343, 1925. 
Medium size, long-haired. General colour between cinnamon-buff and clay- 
colour, grizzled with dark-brown hairs more or less uniformly over dorsal 
surface. Individual hairs (14 mm.) slate for about half length, then buffy 
with darker tips. Sides of body lighter, forearms white. Cheeks and upper 
lip white. Ears long ; tips bluntly pointed ; outer surface lightly clothed 
with light-brown hair, inner surface with silvery hair. Gular glandular area 
well marked in all specimens, a fold of skin along posterior border forming a 
shallow pouch. Ventral surface and inner sides of limbs white, hairs white to 
base. I ail brown above, white below. Manus and pes silvery white. Pes 
medium (4 mm. at base of toes 2.3.4.). Pads three or four, the hallucal being 
present in 12, absent in 5 specimens examined. 
Skull. — Bullae medium. More than three-fourths of diastema. 
Teeth. — Index of incisors, 52°-58°. 
Habitat. — Central and South Australia. 
Type (lectotype). — In British Museum. 
Seventeen specimens examined ; Charlotte Waters, Mulka, S.A Nat Mus 
Nos. R12416-7, R12629, R13719-24, R13734-9, R13742-3. 
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