. The biology of the frog. Frogs. I THE AMPHIBIA IN GENERAL 5 America. Each genus contains but a single species. The larger of these, Si7'en laceriina, is found in the rivers and ponds of the Southern States, from Texas to North Caro- lina. The body is long and snakelike in appearance. The fore legs are very short and situated close behind the exter-. FlG. 2. — Siren lacertina. (From the Cambridge Natural History.) ' nal gills; the feet are four-toed. There are three pairs of gill slits. The genus Pseudobranchus has only one pair of gill slits instead of three, and the feet possess but three t
. The biology of the frog. Frogs. I THE AMPHIBIA IN GENERAL 5 America. Each genus contains but a single species. The larger of these, Si7'en laceriina, is found in the rivers and ponds of the Southern States, from Texas to North Caro- lina. The body is long and snakelike in appearance. The fore legs are very short and situated close behind the exter-. FlG. 2. — Siren lacertina. (From the Cambridge Natural History.) ' nal gills; the feet are four-toed. There are three pairs of gill slits. The genus Pseudobranchus has only one pair of gill slits instead of three, and the feet possess but three toes. The single species, P. striatus, occurs in Georgia and Florida. The Amphiumidse include forms of quite diverse appear- ance, which are sometimes placed in distinct families. The genus Amphiuma is represented by a single species, A. means, found in the Southern States of North America. The body is eel-like, with the very small legs situated far apart, near the two extremities. There is a single pair of gill slits behind the head, near the fore legs. The length of this species is often over two feet. The female lays her eggs in the latter part of the summer, and lies coiled about them in some protected spot, until they hatch. The genera Cryptobranchus and Megalobatrachus are sometimes placed in a distinct family, the Cryptobranchi- dae. The former is represented by the large " hellbender,". 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 Holmes, Samuel J. (Samuel Jackson), 1868-1964. New York, The Macmillan company;[etc. ,etc. ]
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