(5 



Measurements. M. 



T ^. . e ■, . , ( anteroposterior. . . .004 



Diameter of second superior molar < 1 



' transverse 0035 



,, tli - r1 " " (anteroposterior... .0020 



( transverse 0025 



Width of superior incisor .0020 



Length from base of first superior molar to base of in- 

 cisor 0065 



Width between bases of first molars 0020 



Length of first inferior molar 0033 



Depth of ramus at second molar 0050 



Width " below " '. 0035 



Meniscomys multiplicatus, sp. nov. 



This species is considerably larger than the M. Mppodus, and differs in 

 the greater complication of tbe enamel plates of the inferior molars. The 

 four crescentic areas are discernible on the worn surfaces of the crown, of 

 which tbe posterior inner is reduced in size on the middle two molars. 

 Tbe two enclosed lakes bave very plicate borders which form many small 

 loops, and sometimes tbey are fused into a single irregular area. The last 

 molar is extended a little posteriorly, and all present an entrant angle be- 

 tween the inner columns. The coronoid process originates opposite the 

 third molar, and the masseteric ridge ceases below the middle of the jaw 

 below the second molar. 



Measurements. M. 



Probable length of inferior molar series 0120 



Length of posterior three molars 0095 



Diameter of second molar * anteroposterior. ■ 



f ant 

 I tra: 



transverse 0025 



Length of fourth molar 0040 



Depth of ramus below second molar - 0070 



Width "' " " 0050 



Cars ivor a. 



Tjsmnocyon altigenis, gen. et sp. nov. 



Gen. Char. This genus is only known from a mandibular ramus which 

 sui ports all the teeth excepting the incisors and probably the last molar. 

 There are four premolars and probably three true molars, all having the 

 general character of those of Ganis. The only character by which I dis- 

 tinguished the neAV genus Temnocyon is seen in the form of the heel of the 

 sectorial tooth. Instead of presenting a concave surface bounded by ridges 

 or tubercles, it presents a more or less median cutting edge as in the poste- 

 rior premolars of Qxycena. In the typical species, there is but one row 

 of cusps on the first tubercular molar, but they are not elevated, and stand 

 on one side of the crown. In comparing this genus with types other than 

 Ounidce, one can recognize in its characteristic peculiarity of the sectorial 



