. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. MARSUPIALIA. 259 Genus DASYUHUS. (Fig. 81.) Fig. Dasyunts Ursinus, one-third natural sixe. 4—4 1—1 Incisors r——; canines • praemolars O O A 1 2—2 4—4 £1^ J molars 4^4" : ~ *2" The eight incisors of the upper jaw are of the same length and simple structure, and are arranged in a regular semicircle without any median interval. The six incisors of the lower jaw are similarly arranged, but have thicker crowns than the upper ones. The canines present the same or even a greater relative de- velopment than in the
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. MARSUPIALIA. 259 Genus DASYUHUS. (Fig. 81.) Fig. Dasyunts Ursinus, one-third natural sixe. 4—4 1—1 Incisors r——; canines • praemolars O O A 1 2—2 4—4 £1^ J molars 4^4" : ~ *2" The eight incisors of the upper jaw are of the same length and simple structure, and are arranged in a regular semicircle without any median interval. The six incisors of the lower jaw are similarly arranged, but have thicker crowns than the upper ones. The canines present the same or even a greater relative de- velopment than in the Thylacine : in an extinct species of Dasyurus* they had the same form and relative proportions as in the Leopard. The spurious molars have a pointed com- pressed triangular crown with a rudimental tu- bercle at the anterior and posterior part of its base. The grinding surface of the true molars in the upper jaw is triangular; the first presents four sharp cusps, the second and third each five, the fourth, which is the smallest, only three. In the lower jaw the last molar is nearly of equal size with the penultimate one, and is bristled with four cusps, the external one being the longest: the second and third molars have five cusps, three on the inner and two on the outer side; the first molar has four cusps : these are all sharply pointed in the young animal, in which the posterior tubercle of the posterior molar in the lower jaw is divided into two small cusps. The carnivorous character of the above den- tition is most strongly marked in the Ursine Dasyure or Devil of the Tasmanian Colonists, the laigest existing species of the genus, and a most pestilent animal in the poultry-yard or larder. Genus PHASCOGALE. (Fig. 82.). 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 Todd, Robert Bentley,
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