Vertebrate PAtJrA op teE blanco beds. 69 



crown. The P. compressus has but one cusp in this position, while the 

 species of Dicotyles possess two which are disconnected. The root of the 

 canine is not grooved. 



This peccary is characterized by the acuteness and the posterior carina- 

 tion of the cusps of the posterior crest (hypoconid and nietaconid), which 

 are subequal, and for the prominence of the cusps of the heel. Of the 

 latter the internal is the more elevated, and it sends an angle posteriorly 

 to join the apex of a posterior cingulum, which presents a right angle 

 upwards. The external cusp is elevated, but less so than the internal, 

 and has a transverse angular apex. This joins a posterior external angle 

 of a cusp of intermediate elevation, which is appendicular to the internal 

 cusp at its anterointernal side. A strong rib ascends in front of the lat- 

 ter on the posterior face of the posterior cross-crest, which terminates 

 just below the protoconid-metaconid noted. The metaconid presents a 

 keel on the posterior face which incloses a groove with the median verti- 

 cal rib just mentioned, and another groove corresponds to the former on 

 the posterior face of the hypoconid. No external cingulum; enamel 

 smooth. 



Measurements. 



Mm. 



Elevation of protoconid 15 



Elevation of metaconid 15 



Elevation of hypoconid '. 11 



Length of talon 6 



Width of talon 7 



Width of posterior cross-crest 9 



The superior canine has the triangular section of the known species of 

 the Dicotylidse, the anterior face of the root being about half as wide as 

 each of the other faces. It is separated from these by obtusely rounded 

 angles. It is slightly concave or grooved, but the groove is filled with 

 cementum for part of its length. No lateral grooves. 



Measurements. 



Mm. 



Length of root to base of crown 45 



Diameters at base of crown \ anteroposterior 16 



( transverse 11 



The inferior canine was obtained by Mr. Cummins during the season 

 of 1891, and belongs to a rather smaller individual than the one above 

 described. The apex of the crown is lost, but the remainder has the 

 usual triangular section, and its surface is without grooves. The root is 

 grooved posteriorly unsymmetrically, one side being much more con- 

 tracted than the other. Length of specimen on outside of curve, 73 

 mm.; diameters at base of crown, anteroposterior, 15 mm.; transverse, 

 11 mm. 



