. Elementary text-book of zoology [electronic resource]. Zoology. 534 CHORD AT A. that the tri-tubercular or multi-tubercular carnivorous type of tooth of these ancestors, losing its tearing and crushing function became split up into three or more single-cusped elements, which would sfive at least or fl-. The o rudimentary molar teeth of the Mystacoceti or toothless whales are said to break up in this way into simple elements. The molar teeth of elephants consist of many (up to twenty- four) successive ridges, each with its roots. Hence it is Fig. 330.—Diagrammatic Section of Stomach
. Elementary text-book of zoology [electronic resource]. Zoology. 534 CHORD AT A. that the tri-tubercular or multi-tubercular carnivorous type of tooth of these ancestors, losing its tearing and crushing function became split up into three or more single-cusped elements, which would sfive at least or fl-. The o rudimentary molar teeth of the Mystacoceti or toothless whales are said to break up in this way into simple elements. The molar teeth of elephants consist of many (up to twenty- four) successive ridges, each with its roots. Hence it is Fig. 330.—Diagrammatic Section of Stomach of Porpoise. (After Flower and Lyddeker.) a. h, Bile-duct, g, Duodenum, f, Pylorus, e, Pyloric Portion, c, Middle Portion, b, Cardiac Part, a, CEsophagus. possible, by an appeal to the principle of cusp-multiplica- tion, followed by separation, to suggest an origin for the great number, as well as the simple structure of the ceta- ceous teeth. Behind the mouth the larynx and glottis are produced from the ventral wall of the oesophagus upwards as a long. 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; Parsons, John Herbert, Sir, 1868-1957, donor; S. H. Lazarus (Firm); University College, London. Library Services. Edinburgh : E. & S. Livingstone
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
