1875.] MR. A. H. GARROD ON HALMATURUS LUCTUOSUS. 55 
it is, however, much smaller and narrower than in Macropus ; as in 
that genus, it is more marked in the mandibular than in the maxil- 
lary molars. The peculiar twist in the molar-premolar series of the 
lower jaw (the anterior teeth turning outwards and the posterior 
inwards), by which the trenchant edges are rendered parallel as in 
the upper jaw, at the same time that the rami of the mandible 
converge, is, as might be expected from the previously mentioned 
greater parallelism in the maxillary series of Dorcopsis, more marked 
in that genus than in Macropus. It may be mentioned that the 
molar teeth in Dorcopsis and Dendrolagus do not exhibit any 
characters intermediate between Macropus and Hypsiprymnus. 
The remaining bones of the skeleton do not present features of 
special interest. The typical number of precaudal vertebrae are 
present, namely C. 7, D. 13, L. 6, and S. 2; there are 19 caudal 
vertebrze, with well developed chevron bones between the proximal 
ones. The anterior arch of the atlas presents no gap, the two 
moieties meeting with a linear junction. The anticlinal vertebre 
are the 10th, 11th, and 12th dorsal. The clavicles are fairly 
developed ; and the first ribs are very broad. There is a supra- 
condyloid foramen to the humerus; and the fibula is not ossified to 
the tibia. The following are the lengths of some of the most 
important long bones :—Humerus 2°75 inches, radius 3°2, femur 5:1, 
tibia 6:2, fourth metatarsal 1°8, pubic symphysis 1:7. 
Respecting the soft parts, the tongue has three small circumval- 
late papillee at its base, arranged in the ordinary V-shaped manner. 
The palate presents several strongly marked transverse ridges. The 
submaxillary and sublingual glands are small, the former ellipsoid in 
shape. The parotids are large, flat, and triangular, with their bases 
directed towards the root of the neck, and their apices to the mas- 
seter muscle. Their position is indicated by the dotted lines in 
Plate VIII. 
The left lung is formed of a single lobe, witha slight fissure on the 
ventral margin, near the apex, opposite the broadest part of the 
heart. The right lung consists of two lobes, the main portion and 
the azygos lobe. The lobe proper presents two fissures—one near the 
apex, running vertebrally and diaphragmatically, separating an apical 
lobule, the other running vertebro-apically and marking off the 
median lobule*. This median lobule partly embraces the base of the 
heart, as in many animals. There is no third bronchus. 
The heart is quite Macropine, there being two superior venze cave. 
The right ventricle also spirally wraps round the much stronger 
left, as in Macropus. 
The stomach is perfectly Macropine ; that is, it is elongated, sac- 
culated, with the cesophagus entering it much nearer the czecal than 
* The method of description here adopted is an attempt to avoid the employ- 
ment of terms which necessitate any assumption with respect to the position of 
the animal. Supposing the animal to have its vertebral column horizontal, and 
its four limbs on the ground, then the above description might be thus read :— 
“The lobe proper presents two fissures—one near the apex, running upwards 
and backwards, the other running forwards and upwards.” 
