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Show 154 PROF. ST.-GEORGE MIVART ON THE ALUROIDEA. [Feb. 7, is (in general, but not in V. tangalunga) relatively larger and more obtusely triangular or even nearly quadrangular, and is more nearly equal in size with the tooth in front of it; - has a relatively larger The following teeth, which are absent in the Cat, are present in the Genet :- Jiil., *£* !** are one-rooted. The second upper premolar, ^-, which is P 3 • one-rooted in the Cat, is two-rooted, as is also p-^- -1- has its crown more triangular than the Cat's, the heel (or talon) being smaller. ^ is much like that of the Cat. The upper sectorial - differs from the Cat's in that its anterior outer cusp is smaller, its third outer cusp, or talon, distinctly bilobed, and its inner cusp larger and more produced from the general surface of the tooth. The homologous lower tooth, ^ - j , is very like that of the Cat. The first upper molar -- is very much larger than that of the Cat; its antero- P 4 posterior extent compared with that of -*- taken at 100, is in the Genet 37*5, in the Cat, at most, only 3 0 0 ; its transverse diameter compared with that of - taken at 100 is in the Genet 140-0, in the Cat only 800. Moreover it has three roots instead of only two as in the Cat. Its functional surface is trihedral and presents two outer and one inner cusp, with an external cingulum, which is very prominent at the outer anterior angle of the tooth. Between this and the two outer cusps is a flattened somewhat elevated (the skull having the basis cranii upwards) surface. -*- is shaped like - ^ but is very much smaller. The lower sectorial tooth, =-=-^ (the analogue, but not the homologue, of the upper sectorial), has a much larger heel than has that of the Cat, and one which is divided into an inner and an outer cusp. There is also a distinct internal cusp, which is placed opposite to the principal external cusp. ^-^ is a much smaller tooth than ^-., and is generally quadrate or quadricuspidate, but may be trihedral, with two cusps in front and one behind. Of the milk-dentition I have not seen the first upper and lower deciduous D 2 molars. The second upper deciduous molar, -'-, has a rather more developed prominence, both in front and behind the main cusp, than has the tooth which replaces it. It is therefore very unlike that of the Cat, which is a small simple one-fanged tooth. The second lower grinder =-= is like p-- ; but its talon is larger and is distinctly divided. This tooth is not developed in the Cat. D 3 The deciduous upper sectorial, --, agrees with that of the Cat in being quite unlike the tooth which replaces it, and in resembling -*-. It differs from the permanent sectorial (as is the case in the Cat) in that the inner cusp is relatively smaller and nearer to the antero-posterior middle of the tooth. A slight ridge extends from this inner cusp to the anterior cusp; and on this ridge a very small fourth cusp is developed. The homologous lower tooth =-- is like p-j, but has a relatively larger talon, thus resembling the Cat's =-• The hindmost upper milk-molar -*- is quite like *5*-i though not nearly so antero-posteriorly extended as is the deciduous upper sectorial; it is (as in the Cat) larger in relation to it than is - to - . The inferior deciduous sectorial ^ is quite like ^-^ except that the antero-exterior cusp is much smaller than that immediately behind it. In this difference it agrees with the Cat's -"-, but it has not that excess of talon compared with-^-1 which has |