ON HALMATURUS LUCTUOSUS. 275 
The uterus is perfectly Macropine, as are the vagine. No direct 
communication could be found between the uterine pouch of the 
vagine and the common vaginal canal. 
A gland, as usual, about the size of an almond, with a slender 
duct, opens on each side of the narrow cavity included between the 
sphincter ani and the external common sphincter. — 
Tn conclusion, the comparison of the various organs and structures 
of the Macropodide which have come before me in my study of Page 58. 
Dorcopsis luctuosa would lead me to divide up the family in the fol- 
lowing manner :— 
Family MACROPODID. Diprotodont Marsupialia wanting the 
hallux, the second and third digits of the pes being much reduced 
and included in the skin as far as the ungual phalanges, which at 
the same time have the claws so formed that the inner is convex 
inwards and the outer convex outwards, at the same time that 
their contiguous surfaces are flattened. The stomach is elongated 
and sacculated. 
Subfamily Macropop1nz. Macropodidz in which the cesophagus 
enters the stomach near the cardiac end; with a Spigelian lobe 
to the liver; with no lateral longitudinal bands to the colic 
cecum when it is short, and with radius of normal form. 
Section 1. Macropus. With the premolars never much larger than 
the first molar; with a characteristic molar-tooth-pattern ; 
with the stomach but slightly lined with digestive epithe- 
lium (?) and with the hair on the nape of the neck directed 
backwards. Hab. Australia, Tasmania, Aru, and the Ké 
Islands. 
Genera or subgenera. Macropus, Halmaturus, Petrogale, Lagor- 
chestes. 
Section 2. Dorcopsis. With the premolars strikingly large, with 
a characteristic molar-tooth-pattern, slightly modified upon 
that of Macropus ; with the stomach mostly lined with diges- 
tive epithelium, and with the hair of the nape of the neck 
directed forwards. Hab. New Guinea and Mysol. 
Genus 1. Dorcopsis. Limbs Macropine in their proportions. 
Genus 2. Dendrolagus, Protemnodon*, Sthenurus*. Fore limbs 
much longer than in Macropus. 
* An inspection of the plates in Prof. Owen’s paper on these new genera 
(“ Phil. Trans.,” 1873, p. 245), makes it evident that they are scarcely distinguish- 
able from Dendrolagus, and must be included in the Doxcopsis section of the 
family. 
Tt 2 
