Mkm. Nat. Mus. Viot., vin, 1934. 
GLANDULAR AREAS OF SOME AUSTRALIAN JERBOA MICE, 
AND REMARKS ON NYCTINOMTJS AND 
MYRMECOBIVS. 
By Geoffrey Bourne, Hackett Research Student. 
Plate VIII. 
NOTOMYS. 
The genus Notomys as defined by C. W. Brazenor in this 
Memoir is distinguished from the other genus of Australian 
Jerboa Mice ( Podanomalns ) by a glandular area on the ventral 
surface of the neck. 
A gular pouch also occurs in certain Australian bats of the 
genera Taphozous and Nyctinomus. 
The gular glandular area of Notomys cervinus (Gould) is 
bounded by a raised thickened margin and is sunk below the 
surface of the surrounding integument. In one female it 
measured 7 mm. by 6 mm.; in this specimen the area of reflected 
skin does not extend very far forward and is small compared 
with the whole glandular area. 
Vertical sections through the gular region of a female 
specimen with a definite fold of skin were examined. Some 
distance away from the pouch, both dermis and epidermis are 
comparatively thick and hair follicles with attached sebaceous 
glands occur. Closer to the pouch, the integument is rather 
hypertrophied and much folded. Still closer, small lymph 
glands and isolated areas of fatty tissue make their appearance ; 
and closer again, a number of much larger areas of lymphoid 
tissue are scattered through the dermis. (PI. VIII, fig. 1). 
In sections through the gular pouch the integument and the 
reflected flap of skin are definitely hypertrophied (PI. VIII, fig. 
2), and sebaceous glands associated with hairs are also enlarged. 
Notomys mitchelli has a gular glandular area but no reflected 
flap of skin. Sections through this area reveal structures similar 
to those in cervinus / integumental hypertrophy associated with 
enlarged and elongated hair follicles and enlarged attached 
sebaceous glands. 
Brazenor has noted both in N. cervinus and in N. mitchelli 
that the hair of gular glandular areas is specialised. 
In Notomys mitchelli the hairs towards the periphery of the 
area are medullated and the centre of some hairs within the 
[ 90 ] 
