272 ON HALMATURUS LUCTUOSUS. 
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 precandal vertebree are pre- 
sent, namely, C. 7, D. 13, L. 6, and S. 2; there are 19 candal vertebra, 
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 asupracondyloid 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 circumyallate 
papille at its base, arranged in the ordinary V-shaped manner. The 
palate presents several strongly marked transverse ridges. The sub- 
maxillary 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 masseter muscle. 
Their position is indicated by the dotted lines in Plate [9] VIII. 
The left lung is formed of a single lobe, with a slight fissure on the 
' ventral margin, near the apex, opposite the broadest part of the heart. 
Page 56. 
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 vens 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 munch nearer the cecal than 
the pyloric extremity, with the walls of the pyloric end smooth and 
much thickened. The cardiac cecal extremity, like that in Dendrolagus 
as described by Prof. Owen, consists of a single cul-de-sac, not a bifid 
one like that in Macropus giganteus. 
* 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.” 
