HTEACHYUS. 671 



cuneiform is much the smaller, and brings the third metatarsus a short dis- 

 tance proximad to the foui'th. The ectocune'iform is a little wider than 

 deep. The metatarsals are three, and are rather slender. The two outer 

 are equal in length, and the median but little wider proximally, the in- 

 creased Avidth being more obvious distally. They have no proximal grooves, 

 and the outer has a low outer tuberosity. The facets of the second row of 

 tarsals are \ \ \. The phalanges, including- ungual, are 3, 3, 3. The prox- 

 imal ones are longer than wide and contracted at the ends; the penultimate 

 are still stouter in form. The ungues of middle line are symmetrical and 

 broad, with the margin a segment of an ovoid, and slight contraction at the 

 neck. The proximal articulation is bounded by a fossa on each side, which 

 is in its turn isolated by the elongate process found in the tapir and in the 

 horse. The margin is marked by radiating strise separated by grooves, 

 of which the median is the most marked. The lateral ungues are contracted 

 on the inner side, and only possess the proximal fossa and hook on the 

 outer side. The median distal groove is well marked. 



■ Measurements. 



M. 



Length of hind foot from heel 0.286 



Length of calcaneum 053 



Length of cuboid facet of calcaneum 024 



Depth calcaneum behind 025 



Width calcaneum at astragalus 035 



Greatest axial length of astragalus 045 



Width between trochlear crests astragalus 022 



Length neck between trochlear crests, outer side .' 014 



Width head 030 



Width navicular 031 



Length navicular at middle 010 



Length cuboid 022 



Depth do. outside 025 



Length ectocnneiform in front 013 



Width ectocuneiform in front 019 



Width mesocuneiform iu fiont 019 



Length mesocuneiform in front 003 



Length entocuneiform at side 021 



Depth entocuneiform at side 015 



Length of metatarsiis ii 102 



Length of metatarsus iii 107 



Width of metatarsus ii proximally 016 



Width of metatarsus iii proximally 020 



Width of metatarsus ii distally ) within < 016 



Width of metatarsus iii distallv . .. ) fossa t 025 



