1886.] 



NATURAL SCIENCES OP PHILADELPHIA. 



37 



An Extinct Boar from Florida. Prof. Leidy exhibited a spe- 

 cimen consisting of t^o fragments of a tooth, "which together are 

 over three inches long, and form the greater portion of the worn 



extremity of a 

 lo\vertusl<:,with 

 the point bro- 

 ken off, appar- 

 ently of a huge 

 suilline animal. 

 The fragments 

 were mingled 

 with other small 

 ones of tusks of 

 Mastodon fiori- 

 danus, recently 

 collected in Flo- 

 rida. The spe- 

 cimen nearly ac- 

 cords in shape 

 with the corres- 

 ponding part of 

 the tusk of the 

 hog, but approx- 

 imates in pro- 

 portionate size 

 that of the hip- 

 popotamus. The 

 worn surface in 

 the entire tooth 

 has been about 

 three inches 

 long, and is an 

 inch wide. Thin 

 enamel invests 

 the tooth, ex- 



FiQ. 1 Posterior view of the right lower canine tooth; a, worn ceptino" on the 



surface ; 6, broken surface ; c, enamel. ' i^osterior SUr- 



FiG. 2. Transverse section of the same. face aS in the 



hog. Near the broken base of the specimen in one position, extend- 

 ing a short distance from the post-external border, the enamel is 

 defined by a sinuous edge, and appears to show that it ceased 

 about four inches from the point of the tooth, instead of extend- 

 ing the whole length of the tusk as in the hog. The anterior or 

 internal, and the posterior surfaces of the tooth are transversely 

 convex, and the external surface is convex and slightly flattened. 

 In transverse section the tooth is ovate, instead of triangular as 

 in the hog, the inner pole forming the sharp edge of the worn 

 surface. The surfaces of the tooth are smoother even than in 

 the hog, being less marked by longitudinal striae and transverse 



