70 - Mr. Morean’s Description 
 lstate my own views respecting their physiology, to offer a 
short account of their anatomical structure. ; 
The marsupial bones in the female Kangaroo are about three 
inches in length, long and narrow in shape, and incurvated in 
form, compressed laterally, presenting a rounded concave edge 
anteriorly, the posterior edge convex and sharp; the inferior 
extremity or base, by which it is attached to the side of the 
symphisis pubis, is enlarged to form an articular surface for its 
connection with that part. The superior extremity, which gives 
attachment merely to tendon and muscle, tapering to a flattened 
obtuse termination. The bones are placed with their rounded. 
concave edges facing forwards, their bases being in contact, and 
_ their superior pointed extremities being separated to the extent 
of from three to four inches. They are confined in this situation 
partly by ligament and partly by their muscular attachments. By 
a capsular ligament they are bound to the symphisis pubis; and 
by triangular ligaments, the lower fourth of their posterior convex 
edges is connected with the body of that bone (tab. 7. f. a.). 
The muscles attached to these bones are as follows: first, the 
tendon of the external oblique muscle of the abdomen closely 
covers, and is more or less connected with, these bones through- 
out their whole extent, and by the action of this muscle the 
bones are brought nearer together. The abdomen of the Kan- 
garoo is supplied with four recti muscles, an anterior and a 
posterior on each side. "The posterior and broader muscle is 
inserted into the base of the marsupial bone (tab. 7. f. 5.) ; the 
anterior or smaller muscle is inserted by a round tendon into the 
superior extremity of the bone: this tendon extends through the 
centre of the muscle, the fibres of which are continued to the 
point.of its insertion in a double penniform order (tab. 6. f. a.). 
On the outer side of this tendon the muscular fibres terminate 
! at 
