File:Guide leaflet (1901) (14579456047).jpg

Identifier: scienceguide1630amer (find matches)
Title: Guide leaflet
Year: 1901 (1900s)
Authors: American Museum of Natural History
Subjects: American Museum of Natural History Natural history
Publisher: New York : The Museum
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: IMLS / LSTA / METRO

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ther slow in growth, generally consuming two seasons beforethey complete their metamorphosis, according to the tempera-ture of the water and its exposure to sunlight. In the fall thetadpoles burrow into the mud and hibernate. The average tad-pole is three inches in length when the limbs are well advancedin growth, and the young frog, immediately after absorptionof the tail, measures slightly more than an inch. Tadpoles US) BATRACHIANS OF THE VJCINITY OF NEW YORK 203 confined in indoor aquaria are much retarded in their growth,and many remain as such for a period of three years or more. The Bull Frog, Rana catesbiana Shaw (Fig. 26), is very largeand stout. Limbs short but powerful. Hind feet large andvery fully webbed. Head wide. Color above, lightolive, irregularly blotched or marbled with dark oliveor brown. The intensity of these markings varies withindividuals and the disposition of the individuals themselves.Limbs, especially the hind pair, with brown blotches which to- Bull Frog.
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FIQ. 28- THE BULL FROGFrom specimen in New York Zoological Park ward the extremities assume the form of bands. The underparts are silvery white, with grayish markings, the throat inmany individuals assuming a yellowish tinge. The portion ofthe head between the mouth and the eyes is usually tinged withpale green; the upper surface, however, matches the generalcolor of the body. Half-grown specimens resemble the adult of the Pond Frog,but may b nized by the absence of the vein-like fold of (49) 204 THE AMERICAN MUSEUM JOURNAL skin which is present on each side of the body in that species.There is, in fact, no trace of this in the Bull Frog. A full-grownspecimen will measure 14J inches from the tip of the snout tothe end of the outstretched limbs, and 6f inches when in asitting position. Such a specimen would weigh about one pound. Range: The eastern and central portions of the UnitedStates and southern Canada. Local Distribution: General, but not so abundant as thePond Frog. The Bull Fr

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