. Elementary text-book of zoology. 494 CHORD ATA. body, covered not only with thick fur but with strong pointed spines scattered amongst the hair. The general colour is brownish and the spines are usually yellowish. The facial part of the head is produced into a long tubular rostrum. The eyes are small. The limbs each have five toes and in the typical species all are clawed. The tongue is long and protrusible. There is a small poison-spur on the hind-limb. The tail is almost absent. The animal is fossorial and anteating in its habits and can burrow rapidly. It is said not to make a nest but to
. Elementary text-book of zoology. 494 CHORD ATA. body, covered not only with thick fur but with strong pointed spines scattered amongst the hair. The general colour is brownish and the spines are usually yellowish. The facial part of the head is produced into a long tubular rostrum. The eyes are small. The limbs each have five toes and in the typical species all are clawed. The tongue is long and protrusible. There is a small poison-spur on the hind-limb. The tail is almost absent. The animal is fossorial and anteating in its habits and can burrow rapidly. It is said not to make a nest but to carry its egg, which has a thin horny shell, in a temporary pouch. The mam- mary glands are like those of Ornithorhynchus. The skull Fig. 339.—Skull of Ornithorhynchus x \. Maxilla. Intermaxillary, Horny Pad. Zygomatic. Arch. Foramen Magnum. Aj Ventral view of Symphysis. Horny Pad. Condyle. B, The mandibles from above. of Echidna., in its modifications for ant-diet, is rather like that of the true anteaters. We may note (i) the absence of teeth ; (2) the great elongation of the facial region; (3) the degeneration of the lower jaw or mandible. The functions of teeth and lower jaw have largely been usurped by a long adhesive tongue. Order II.—Allotheria. These consist of a series of small extinct mammals {Flagiaulax, Microlestes), chiefly known to us by their mandibles or lower jaws and their teeth. They occur in 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 Masterman, Arthur Thomas. Edinburgh, E. & S. Livingstone
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