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Monotremata - LoveToKnow 1911 |
 | | MONOTREMATA (a name referring to the single outlet for all the excretory channels of the body), the lowest subclass of the Mammalia, represented at the present day solely by the platypus and the echidnas. |
 | | In the case of Ornithorhynchus it has been said that two eggs are laid in the chamber at the end of the burrow,' but those of the Echidnidae are carried about in the pouch on the abdomen of the female, which becomes enlarged during the time of incubation. |
 | | In the latter, three pairs of these teeth are developed in the upper, and three in the lower jaw; but after being for some time in use, they gradually become worn away, and are finally shed. |
| www.1911encyclopedia.org /Monotremata (1544 words) |
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