Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] TOADS, FROGS AND SALAMANDERS 257 and its tributaries. The salamanders and newts are common in many regions. Most of them possess neither gills nor gill openings in the adult. Some of them are often called lizards, but they differ widely from the lizards in many re- spects. The body is soft and not provided with scales, and in their development they pass through a tadpole stage similar to that of the frogs and toads. Amblystoma tigrinum is an interesting and widely distributed common species. In some
Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] TOADS, FROGS AND SALAMANDERS 257 and its tributaries. The salamanders and newts are common in many regions. Most of them possess neither gills nor gill openings in the adult. Some of them are often called lizards, but they differ widely from the lizards in many re- spects. The body is soft and not provided with scales, and in their development they pass through a tadpole stage similar to that of the frogs and toads. Amblystoma tigrinum is an interesting and widely distributed common species. In some regions the larval form, knowrn as axolotl, reaches a large size and produces young before completing the usual metamorphosis. FIG. 117.—A brown salamander, Notophthalmus lorosus. (Reduced.) The Frogs and Toads (order Anura).—This is by far the largest and most important order of Amphibia. There are about a dozen species of frogs, family Ranidce, found in the United States. The well known bullfrog, Rana catesbiana, is the largest of these, attaining a length of seven or eight inches. It occurs in ponds and sluggish streams all over the eastern United States and in the Mississippi Valley. Frogs are very commonly used as food in the United States but not as extensively as in some of the European countries. The large hind legs and 'saddle' afford a considerable mass of very deli- cately flavored meat. It has been pointed out that there is an opportunity for the development of a small but profitable industry in raising frogs for market in some of the extensive 17
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