350 
TARSIPES R0STRATU8. 
spinous, process. Of sacral vertebrae there are three; their 
transverse processes join the ilium. The caudal vertebrae 
are very numerous, being thirty-four in number [the total 
number of vertebras, therefore, is sixty-two]; they present 
little worthy of notice, if we except that the transverse pro¬ 
cesses of the basal three are much developed, flat, and 
expanded : the fourth caudal has but a very small transverse 
process, and the remaining vertebrae arc simple, or nearlv 
so : between the interspace of each pair, beneath, is a small 
bone having the outer surface flattened — it represents the 
haemapophysis of the vertebra. The spine of the scapula is 
straight, or very nearly so, inclines over the infra-spinal part 
of the scapula, and is produced in front into a long, and 
extremely slender (almost hair-like) acromion process. The 
upper and lower edges of the scapula run nearly parallel at 
the anterior third portion, and there form a narrow neck ; 
the lower edge is very nearly straight, and, passing back¬ 
wards, gradually recedes from the spine, aud the narrow 
infra-spinal fossa is truncated behind, so that its outline at 
that part forms a right angle with the line of the spine : the 
supra-spinal portiou of the scapula is much larger, and, from 
the neck, is expanded so as to fonu nearly a semicircle. The 
clavicle is long and slender. The humerus is slender, lias no 
perforation at the lower extremity : the deltoid ridge forms an 
obtuse angle, at the termination of the anterior third ; the ex¬ 
ternal and internal tubercles are small; the former rises scarcely 
as high as the head of the humerus ; the outer condyloid 
ridge terminates in an obtuse angle at the commencement of 
the lower fourth of the humerus. The remaining bones of 
the fore leg present nothing to arrest our attention : the ulna 
and radius are in contact nearly for their entire length, being 
but slightly separated in the middle ; the olecranon is well 
de\ eloped. Ihe pelvis offers no peculiarities, excepting that 
it is more elongated than usual. The marsupial bones are 
straight, small, and slender. The femur is straight, has the 
head directed inwards and forwards, and joined to the shaft 
bv a short neck ; a depression for the ligamentuin teres is 
visible ; the two trochanters are small. The patella is 
present. The tibia aud fibula are distinct, in contact at the 
