January 14, 1960. 22. Review of the Insectivores of Korea.
"A Review of the Middle American Tree Frogs of the Genus Ptychohyla"
William E. Duellman
As instances of the correctness of his view he quotes the fact that the more ancient mammals, such as Monotremes, Marsupials, Lemurs, Edentates, and Insectivores, all inhabit the more southerly parts of the world.
"The History of the European Fauna"
R. F. Scharff
The value of the Insectivores, Solenodon in Cuba, Centetes in Madagascar, has been much lessened by their recognition as an extremely ancient group and as a case of convergence, but if they are no longer put into the same family, this amendment is really to a great extent due to their widely discontinuous distribution.
"Darwin and Modern Science"
A.C. Seward and Others