OANID^. 941 



crowns of the other premolars are wide at the base and form each a simple 

 cone, with a short posterior basal heel. The sectorial is relatively not long, 

 but is robust, and with thick blades. The internal heel is well developed 

 as in Canis, while a cingulum represents an anterior lobe. The tubercular 

 molar is narrower in fore and aft diameter than in Temnocyon coryphceus, 

 or Canis Jafrans, although it presents the same details. These are a wide 

 obtuse external cingulum, two external tubercles, a median, an obtuse in- 

 ternal tubercle, and a wide internal cingulum. The premolars of the lower 

 jaw are similar to those of the maxillary bone. The inferior sectorial is 

 quite robust, and the internal cusp is well developed. The heel is shorter 

 than the blades of the crown, and is wide and without tubercles in its some- 

 what worn condition. Its external border rises to an edofe. The tubercular 

 is wider than the corresponding tooth in the cotemporary species of Camdce, 

 although not so wide as long. Its crown rises in two low tubercles which 

 stand transversely near the middle. 



Measurements. 



M. 



Length of skull to orbit (axial) 049 



Depth of skull to orbit (axial) 042 



luterorbital width 040 



Width of uarcs 017 



Length of superior molar series 03S 



Length of bases of three premolars 019 



Length of base of sectorial 013 



Width of sectorial in front 009 



AVidth of first tubercular anteroposteriorly 006 



AVidth of first tubercular transversely 014 



Length of mandible to angle 093 



Elevation at coronoid 051 



Elevation at sectorial 0^0 



Length of inferior molar series 045 



Length of inferior sectorial 014 



Length of heel of inferior sectorial 003 



Length of inferior tubercular 006 



Width of inferior tubercular 005 



Van der Hoeven has given^ descriptions and figures of the skull and 

 dentition of the Icticyon venaticiis of Lund, of Brazil. From these it appears 

 that the present species differs from the latter in the greater development of 

 the inner part of the tubercular molar of the superior series ; in I. venaticiis 

 this pai-t is much reduced. The tubercular molar of the lower jaw is also 



'Overhet Gestlackt Icticyon; wis. cu natucirk. vert, der Koninkl. Akademie Amsterdam, Deel IIL 



