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Updated: May 2, 2025
In the same way their affinities are seen to be with the lowest of mammals, the MONOTREMES and MARSUPIALS. The monotremes, such as the duckbill mole and the spiny ant-eater of Australia, reproduce by means of eggs resembling those of reptiles; the marsupials, such as the opossum and the kangaroo, bring forth their young alive, but in a very immature condition, and carry them for some time after birth in the marsupium, a pouch on the ventral side of the body.
For instance, the mediastinum, the sutura sagittalis, the scrobiculus cordis, the marsupium cordis, the chambers of the heart, the velum palati, the trochanter, the rima glottidis, the fontanelles, the alæ of the nose, all have their present names, not from original Latin expressions, but from the translation of Arabic terms.
We come now to animals less familiar to you, and none of which inhabit Europe. We shall therefore pass more quickly over them. Marsupium is Latin for purse, pouch, or pocket. The marsupials are distinguished from other animals by a pouch which the mother has under her belly, and in which the little ones take refuge at the slightest alarm.
Even so, however, the juniors take care always to keep tolerably near that friendly shelter, and creep back into it again on any threat of danger, exactly as baby-kangaroos do into their mother's marsupium.
Now the opossums are unlike most mammals in that they possess two bones attached to the fore part of the pelvis, which are commonly called "marsupial bones." The name is a misnomer, originally conferred because it was thought that these bones have something to do with the support of the pouch, or marsupium, with which some, but not all, of the opossums are provided.
Marsupials, development of the nictitating membrane in; uterus of; possession of nipples by; their origin from Monotremata; abdominal sacs of; relative size of the sexes of; colours of. Marsupium, rudimentary in male marsupials.
Didn't I tell you that there's a world of work to be done over the mussel? But if you like to walk along, why, I'll tell you anything I can." "Thanks, ever so much," the boy said; "but what puzzles me in this Bulletin is the mussel's marsupium, or pouch. Has a fresh-water mussel really got a pouch like a kangaroo?" The Deputy Commissioner pushed his hat back over his forehead.
"Colin," he said, "you have a knack of putting questions in the most awkward fashion. I suppose, in a way, the answer is 'not quite, because in the kangaroo, the baby is almost completely formed when it is placed in the pouch, while in the mussel, only the egg goes there. The word 'marsupium' was what threw you off.
The peculiarity of all this class of animals, from the smallest to the largest, is the marsupium, or pouch, in which the females carry their immature young until they are old enough to shift for themselves. The kangaroo is almost confined to Australia, though several species are also to be met with in the neighbouring islands. I must now be excused if I talk a little "shop."
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