. Elements of zoölogy. Zoology. AMPHIBIOUS VERTEBRATES. 197 blind * Batrachian found in the subterranean caves of Adelsberg in Carniola, Fig. 239.—Proteus of Carniola caverns, showing the external gills. Note.—They are pure white, have bristling gills and gill-openings, and small teeth. The limbs are four in number, the fore pair having three toes and the hinder pair two. They breathe under water by the gills and above by lungs, while experiment has shown that the former can be removed without injuring them. The mud-puppy {Necturus) of the United States is a familiar form in the Miss
. Elements of zoölogy. Zoology. AMPHIBIOUS VERTEBRATES. 197 blind * Batrachian found in the subterranean caves of Adelsberg in Carniola, Fig. 239.—Proteus of Carniola caverns, showing the external gills. Note.—They are pure white, have bristling gills and gill-openings, and small teeth. The limbs are four in number, the fore pair having three toes and the hinder pair two. They breathe under water by the gills and above by lungs, while experiment has shown that the former can be removed without injuring them. The mud-puppy {Necturus) of the United States is a familiar form in the Mississippi country and upper New York. The body is broad and flat; each foot has four toes ; they attain a length of two feet. They are extremely sluggish, living in muddy water. The eggs are about the size of peas. Order III. Tailed Amphibians (Urodela).—In this order the gills are generally only present in the early stages ; the body is slender and eel-like. The Congo snake (Fig. 240) has extremely delicate limbs, and inhabits the muddy waters of the Southern States. The hell- bender, or Menoto?7ia, found in the Mississippi Valley, pos- sesses permanent gills, is flat, with weak limbs and a prom- * The eyes of the Proteus are destitute of a crystalline lens, although they have a 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 Holder, Charles Frederick, 1851-1915; Holder, Joseph Bassett, 1824-1888, joint author. New York : D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
