TARSIUS BANCANUS. 



As the teeth of the Tarsius Bancanus differ in several particulars from those 

 of the other Tarsii, it may contribute to the elucidation of this genus, to present a 

 detailed description of them, with reference to the Plate of Illustrations. — See PI. of 

 111. Let. G. [a) upper-jaw, 1 front tooth; 2 Canine; 3, 4, 5, 6, 7, Grinders: (5) 

 lower-jaw, 1 front tooth; 2 Canine; 3, 4, 5, 6, 7, Grinders. 



I shall further add an enumeration of the different species of this genus that 

 have hitherto been described, with their characters, as given by Professor Gotthelf 

 Fischer in the Works cited. 



Teeth of Tarsius Bancanus. — Front Teeth: in the upper-jaw none interme- 

 diate ; exteriorly, one on each side, minute, cylindrical, consisting of a simple point, 

 projecting about one-third of a line beyond the gums : in the lower-jaw, two inter- 

 mediate, long, attenuated towards the point, which is slightly rounded, projecting 

 obliquely forward, diverging in a small degree from the middle, where they approach 

 nearest to each other, surrounded at the base by a slightly projecting margin. 

 G. a, 1. b,l. 



Canine Teeth. — In the upper-jaw one on each side, slender, somewhat angular, 

 acute, inclining obliquely inward : in the lower-jaw one on each side, attenuated, com- 

 pressed, somewhat shorter than the front teeth, but closely applied to them above, 

 and having the same direction. G. a, 2. h, 2. 



Grinders. — In the upper-jaw five ; the first rather broad at the base, angular, 

 simple, pointed : the second and third smaller than the first, but larger successively, 

 somewhat compressed, each ha^dng a single point, with an additional projection 

 anteriorly and posteriorly, representing a compressed base, from Avhich the point 

 rises : the fourth and fifth very large, and nearly equal, consisting of a broad base, 

 from which project three high, acute, somewhat angular points, one on the interior, 

 and two on the exterior margin, having in the middle a considerable concavity : in 

 the lower-jaw five, the three anterior consisting of a single point ; the first broad at 

 the base, pyramidal, acute, somewhat oblique, encircled at the base by a margin, lai-ger 

 than the second and third, which being removed somewhat interiorly, in consequence 

 of the curvature of the lower-jaw, have a disposition slightly different from the 

 corresponding teeth in the upper-jaw : the fourth and fifth are large, and resemble 

 those which are opposed to them ; the points on their surface are less regular ; they 

 form two transverse ridges in the anterior and posterior part of the crown, between 

 which is a considerable groove. G. {a) 3, 4i, 5, 6, 7. {h) 3, 4, 5, 6, 7. 



