. Annals of the New York Academy of Sciences. Science; Science -- New York (State). 296 ANNALS NEW YORK ACADEMY OF SCIENCES these regions. The EanidgR, like the Bufonidae, represent a less ancient dispersal, probably from a southern Palsearctic or Oriental center, since they have reached northern Australia on one side and northwestern South America on the other, and, while they have reached Madagascar and the Solomon Islands, they have failed to reach the Antilles. These suggested lines of dispersal are based upon the present distribu- tion interpreted in accord with the principle'fe outlined
. Annals of the New York Academy of Sciences. Science; Science -- New York (State). 296 ANNALS NEW YORK ACADEMY OF SCIENCES these regions. The EanidgR, like the Bufonidae, represent a less ancient dispersal, probably from a southern Palsearctic or Oriental center, since they have reached northern Australia on one side and northwestern South America on the other, and, while they have reached Madagascar and the Solomon Islands, they have failed to reach the Antilles. These suggested lines of dispersal are based upon the present distribu- tion interpreted in accord with the principle'fe outlined in previous pages of this article. While the past liistory of the Amphibia is too little known Ci/s/igna FiG. 33.—Distribution of three families of Anura These may be interpreted as due to three successive dispersals from the north. The other families of frogs and toads are more widely spread, and their regional abundance has conditioned certain peculiarities in the distributions here sliown. to confirm them liy adequate direct evidence, I believe that good infer- ential evidence might be obtained from a comparison of the progressive or archaic characters of the skeleton in the different families. The fossil Amphibia afford sufficient evidence to determine the broader lines of their evolution and differentiation, although they tell very little about their past distribution. The same conditions liold true with regard to the fresh-water Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Academy of Sciences; Casey, Thos. L. (Thomas Lincoln), 1857-1925; Van Ingen, Gilbert, 1869-; Poor, Charles Lane, 1866-; Hovey, Edmund Otis, 1862-1924; Tower, Ralph W. (Ralph Winfred), 1870-1926. New York, New York Academy of Sciences
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