10 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 6S 



The crown of the lower left hindmost molar (pi. 3, fig. 6) is in 

 perfect condition. The roots, except their bases, are missing, a re- 

 sult apparently, of rude methods of collecting. The left, or outer, 

 border of the crown is nearly straight, the inner border is slightly 

 convex. The wear from mastication has affected the summits of the 

 three crests. We may judge therefrom that this tooth did not belong 

 to the same individual as did the upper third molar. 



The length of the crown is 136 mm.; the width at the first crest, 

 62 mm. ; at the third, 64 mm. The height of the second inner cone, 

 slightly worn, is 45 mm. There may be said to be four crests, the 

 fourth not yet separated from the talon. The buttresses applied to 

 the front and rear faces of the outer cones join and block the val- 

 leys. On sufficient wear the cones and buttressing conules would 

 produce trefoils with large basal lobes. The buttress on the hinder 

 face of the third outer cone is composed of three or four conules. 

 The imperfect fourth crest and the talon fused therewith form a 

 rosette inclosing a pit. The crest portion is composed of an outer 

 and an inner pair of conules, the pairs being separated by the thin 

 fissure which traverses the croAvn from front to rear. In each pair 

 the conule next the fissure is the smaller. In the outer pair the 

 smaller conule is situated in front of the larger one and corresponds 

 to a buttress. The talon portion is composed of a curved row of six 

 closely appressed conules. There is no cingulum except the usual 

 ridge in front. A large tubercle at the outer end of the valleys may 

 represent the cingulum. 



The inner cone of each crest is divided by a thin fissure into two 

 parts, a small inner one and a larger outer. Each outer cone is 

 divided by an oblique fissure which cuts off a conule forming the 

 anterior buttress. A small amount of cement appears in the valleys 

 and in thin patches elsewhere. The roots (text-fig. 3) consisted of 

 an anterior fang which supported the anterior crest and a larger one 

 which sustained the remainder of the crown. 



4. Description of the tusks, upper and lower 



The fragments of upper tusks represent at least four individuals. 

 One is indicated by only one fragment about 95 mm. long, but its 

 diameters exceed all of the others, its greater axis being 66 mm., its 

 smaller 49 mm. A very young individual is represented by two 

 lower tusks. Four fragments of upper tusks contain the pulp 

 cavity. These appear to have belonged to two individuals. Of one 

 of these there are three pieces. The most important tusk consisted 

 of several fragments, one of which is missing. The pulp cavity 

 is 100 mm. deep, but it is estimated that it was originally at least 

 140 mm. deep. The fragment which connects with the one just 

 mentioned is 96 mm. long, and it came down near the end of the 



