TREE FROG

This article appears in Volume V27, Page 235 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: TOO-TUM

TREE FROG . Many different groups of tailless Batrachians (see FROG) are adapted to arboreal life, which is indicated by expansions of the tips of the fingers and toes, adhesive disks which assist the animal in climbing on vertical smooth surfaces. These disks do not act as suckers, but adhere by rapid and intense pressure of the distal phalanx and

special

SPECIAL

muscles upon the lowersurface, which is also provided with numerous glands producing a viscous secretion.
The best-known tree frog is the little Hyla arborea of continental Europe, rainette of the French, Lauhfrosch of the Germans., often kept in glass cylinders provided with a ladder, which the frog is supposed to ascend or descend in prevision of the weather. But

recent

RECENT

experiments conducted on scientific principles show that not much reliance can be placed on its prophecies. This frog is one of the smallest of European Batrachians, rarely reaching 2 in. in length; its upper parts are smooth and shiny, normally of a

bright

BRIGHT, JOHN (1811-188g)
BRIGHT, SIR CHARLES TILSTON

grass-green, which may

change

CHANGE (derived through the Fr. from the Late Lat. cambium, cambiare, to barter; the ultimate derivation is probably from the root which appears in the Gr. «a urmu', to bend)

rapidly to yellow, brown, olive or black; some specimens, deprived of the yellow pigment which contributes to form the green colour, are sky-blue or

turquoise

TURQUOISE

blue; the lower parts are granulate and white.
The family Hylidae, of which the European tree frog is the type, is closely related to the Bufonidae or true roads, being distinguished from them by the presence of teeth in the upper jaw and by the claw-like shape of the terminal phalanx of the digits. It is a large family, represented by about three hundred species, two hundred and fifty of which belong to the genus Hyla, distributed over Europe, temperate Asia, North Africa, North and

South

SOUTH
SOUTH, ROBERT (1634–1716)

America, Papua and Australia. Close allies of Hyla are the Nototrema of Central and

South

SOUTH
SOUTH, ROBERT (1634–1716)

America, in which the female develops a dorsal broad pouch in which the

young

YOUNG
YOUNG, A
YOUNG, ARTHUR (1741-1820)
YOUNG, BRIGHAM (1801-1877)
YOUNG, CHARLES MAYNE (1777–1856)
EDWARD
- EDWARD
_16831765_.html">YOUNG,
EDWARD
- EDWARD
(1683–1765)
YOUNG, JAMES (1811-1883)
THOMAS
_1773_1829_.html">YOUNG,
THOMAS
(1773-1829)

undergo part or the whole of their metamorphoses. The genus Phyllomedusa, also from Central and South America, are quadrumanous; the inner

finger

FINGER

and the toe being opposable to the others. and the foot being very similar to the hand. These frogs deposit their spawn between the leaves of branches overhanging water, into which the tadpoles drop and spend their larval life.

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