. Text-book of zoology for junior students. Zoology. 352 VELiTJCHlJATE ANIMALS. The rii, or are essentially cliaracterised by the fact that the fure-luubs are iiuieh lunger than the hind-limbs, and have several of the fingers eiiornionsly elongated (fig. 256). These enor- nionsly lengthened digits are united by an expanded leathery mem- brane or " patagiuni," which not only stretches between the fingers, but is also extended between the fore and hind lindjs, and is attached to the sides of the body (fig. 257). The ])atagiura thus formed often includes the tail, and is nearly or
. Text-book of zoology for junior students. Zoology. 352 VELiTJCHlJATE ANIMALS. The rii, or are essentially cliaracterised by the fact that the fure-luubs are iiuieh lunger than the hind-limbs, and have several of the fingers eiiornionsly elongated (fig. 256). These enor- nionsly lengthened digits are united by an expanded leathery mem- brane or " patagiuni," which not only stretches between the fingers, but is also extended between the fore and hind lindjs, and is attached to the sides of the body (fig. 257). The ])atagiura thus formed often includes the tail, and is nearly or quite naked or destitute of hairs on Ijoth sides. It is used as an organ of true flight, and, in accordance with this, there are well-develojied collar- bones (clavicles), and the breast-lione is furnished with a ridge for the attachment of the iiectoral muscles. Of the fingers of the hand. Fig. 2rj7. —Cheiroiitera. Vcsi)crtiUo discolor, one-half the natural size. at least three are destitute of nails. The mammary glands are placed upon the chest. Teclli of three kinds are always present, and the canines are always well developed. The Bats are all twilight-loving or nocturnal animals, and they are the only Mammals which ]iossess the power of true flight, though several othei'S can make extended leaps from tree to tree. The eyes are small, Init the ears are very large, and their sense of touch is acute. During the day they retire to caves or crevices in rocks, where they suspend themselves by the hind-feet, which are jirovided with curved claws. In their flight, tliough they can turn with great ease, they are by no means as rapid and active as the. 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 Nicholson, Henry Alleyne, 1844-1899. New York, American Book Co
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1885
