. On the anatomy of vertebrates [electronic resource] . Dentition of an adult female Gorilla, nat. size. cm. in the female. In the male Gorilla the canine is more in-clined outward; the anterior groove on the inner surface of the TEETH OF DIPHYGDONTS. crown is deeper, the posterior groove is continued lower downupon the fang, and the ridge between the two grooves is moreprominent than in the Troglodytes niger. Both premolars, 255. Dentition of upper jaw, male Troglodytes Gorilla, uat. size. cm. fig. 255, p 3, and p 4, are bicuspid; the outer cusp of the first,and the inner cusp of the second b
. On the anatomy of vertebrates [electronic resource] . Dentition of an adult female Gorilla, nat. size. cm. in the female. In the male Gorilla the canine is more in-clined outward; the anterior groove on the inner surface of the TEETH OF DIPHYGDONTS. crown is deeper, the posterior groove is continued lower downupon the fang, and the ridge between the two grooves is moreprominent than in the Troglodytes niger. Both premolars, 255. Dentition of upper jaw, male Troglodytes Gorilla, uat. size. cm. fig. 255, p 3, and p 4, are bicuspid; the outer cusp of the first,and the inner cusp of the second being the largest, and the firstpremolar, p 3, consequently appearing the largest on an externalview. The difference is well marked in the female, fig. 254, p anterior external angle of the first premolar is not producedas in the Orang, which in this respect makes a marked approachto the lower Quadrumana. In Man, where the outer curve ofthe premolar part of the dental series is greater than the inner 320 ANATOMY OF VERTEBRATES. one, the outer cusps of both premolars are the largest ; thealternating superiority of size in the Gorilla accords with thestraight line which the canine and premolars form with the truemolars. In fig. 255, ml, m 2, m 3, are quadricuspid, relativelylarger in comparison with the bicuspids than in the Orang. Inthe first and second molars of both species of Troglodytes a lowridge connects the ante
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