. The tailless batrachians of Europe. Frogs; Amphibians. 24 INTRODUCTION. a stripped skin held against the light, gives rise to the yellow vertebral line which is normal calamita, and only exceptional in B. vliiJls and wiiZ^ar/s, inde- pendently of another light vertebral streak which is sometimes also present. The independence of the two is most conspicuous in cases of deviation of the former, as often happens in Bafo calamita, which appears to be caused by the presence of large glands in the course of the raphe necessitating a winding (Fig. 9). Fig. Biifo calamita, showing yellow
. The tailless batrachians of Europe. Frogs; Amphibians. 24 INTRODUCTION. a stripped skin held against the light, gives rise to the yellow vertebral line which is normal calamita, and only exceptional in B. vliiJls and wiiZ^ar/s, inde- pendently of another light vertebral streak which is sometimes also present. The independence of the two is most conspicuous in cases of deviation of the former, as often happens in Bafo calamita, which appears to be caused by the presence of large glands in the course of the raphe necessitating a winding (Fig. 9). Fig. Biifo calamita, showing yellow raphe, independent of light vertebral streak, and its deviation from the median line in the middle of the back. The epidermis is remarkable for the formation of horny cells, as the spines on the warts of some toads and Bomhlnator (Fig. 10, p. 29), or the sheaths on the tips of the digits in Bnfo and Pelobates, or on the metatarsal tubercles Avhen these are much developed. There are also, in some Batrachians, special small, pearl-like warts, mostly pigmentless, the "tact-spots". 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 Boulenger, George Albert, 1858-1937. London, Printed for the Ray society
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Keywords: ., bookcentury1800, bookdecade1890, booksubje, booksubjectamphibians
