NOTES ON A NEW FOsSIL MAMMAL. 9 



The central rows are C(^mj)o.sefl of two anterior and two posterior 

 pillars of which the anterior ones are the largest of all. At the apex 

 of tlie triangle are two pillars, the larger being placed almost in 

 the median lonofitudinal line and the smaller in contact with it at 

 the inner posterior edge. 



Xear the posterior margin of the riglit orbital fn-amen, a trace of 

 a molar is found enclosed in the bone (PI. T[. M.,). Judging from 

 its position, as well as from the young state of the animal, it 

 is probably to be considered as the second medlar which was not yet 

 functional as in the case of tlie upper incisor. As the posterior 

 portion of the lower jaw, posterior to the position of the first (?) 

 molar, is broken away, it is not certain whether the second (?) 

 molar ever existed. 



From the above statement it is to be concluded that the animal 

 had probably two incisors, four(?) j»remolars and friur molars 

 in the upper jaw, and four premolars and two or four molars in 

 the lower. 



It is of interest to add here, that another tooth probably belong- 

 ing to the same genus, if not to the same species, was brought by a 

 Mr. S. ItO in 1897 from an entirely différent locality. He is a 

 resident of the village of Ynnomachi near Matsue in the province of 

 Izumo, and it was reported by him that the specimen had been 

 picked up by another person in the vicinity of the village. It (PL 

 III. fig. 7 a & b) has a crown which is quite similar in color and 

 structure to the ab(^ve described teeth. The crown is likewise split 

 bv a lonsfitudinal furrow runninu' down to its base. The small 

 number of tubercles in the tooth seems t<j indicate that it is a lower 

 molar, but tlie crown is very smtdl in size when compared with the 

 specimens already described, being only 4..H'"' in height, and o.5"" and 



