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Updated: June 5, 2025
The mode of origin of the Monodelphia from these is a very difficult problem, for the most part left open by Professor Haeckel. As regards the latter question, I have little doubt that the Sirenia connect the Ungulata with the Proboscidea; and none, that the Cetacea are extremely modified Carnivora. The passage between the Seals and the Cetacea by Zeuglodon is complete.
"No," I told Conseil, "that's no mermaid, it's an unusual creature of which only a few specimens are left in the Red Sea. That's a dugong." "Order Sirenia, group Pisciforma, subclass Monodelphia, class Mammalia, branch Vertebrata," Conseil replied. And when Conseil has spoken, there's nothing else to be said. Meanwhile Ned Land kept staring.
Gladstone affirms, "are given to us in Genesis in the order of succession in which they are also given by the latest geological authorities." I must venture to demur to this statement. Moreover, I pointed out that as these Cetacea and Sirenia are certainly modified land animals, their existence implies the antecedent existence of land mammals.
The dugong rises to the surface at frequent intervals for air, and the ancients in the rounded heads of the mother and her offspring fancied a resemblance to human beings, who sought to lure the unwary to their mansions beneath the waves. Hence the scientific title "Sirenia" for the family to which the dugong belongs.
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