. The Cambridge natural history. Zoology. HETERODONTY AND HOAIODONTY 47 contrary to the prevailing superstition, it is not domestic animals wliicli show the greatest amount of tooth variation. As to special homologies between tooth and tooth, with which we shall deal on a later page, ]\Ir. Bateson has urged almost insuperable difficulties. The teeth of the ilammalia are almost without exception " heterodont,'' they show differences of structure in different oc par. Flu. 3i.—Skull of Z)as7/i(ras (lateral view), , Allsphenoid ; ang, angular process of mandibl
. The Cambridge natural history. Zoology. HETERODONTY AND HOAIODONTY 47 contrary to the prevailing superstition, it is not domestic animals wliicli show the greatest amount of tooth variation. As to special homologies between tooth and tooth, with which we shall deal on a later page, ]\Ir. Bateson has urged almost insuperable difficulties. The teeth of the ilammalia are almost without exception " heterodont,'' they show differences of structure in different oc par. Flu. 3i.—Skull of Z)as7/i(ras (lateral view), , Allsphenoid ; ang, angular process of mandible ; fr, frontal; ju, jiigal ; Icr, lachrymal; max, maxilla ; nas, nasal ; , occipital condyle ; par, jiarietal ; , paroccipital process ; , preraaxilla ; , supraoccipital; sq, .squamosal ; sq, zygomatic process of squa- mosal. (From Parker aud Haswell's Zoology.) parts of the mouth. As a general rule, teeth can be grouped into cutting incisors, sharp conical canines, and molars, with 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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