SYNOPSIS OF THE VEItTEBRATE FAUXA OF THE PUERCO SERIES. 357 



mal cud of the bone. Between it and the sustentaeuhir laeet is a ligamentous fossa 

 In front of it the superior surface descends into a deep ti'ansverse notch which re- 

 ceives a descending angidar process of the astragahis which is broken from my 

 specimens. In other words the superior border of the cuboid facet rises ui)wards 

 abru|)tly in front of this depression. This facet is quite large and narrows to an apex 

 inwards, where it terminates at a small vertical tuberosity. Inferior to this apex is a 

 8ul)triangular fossa, which is bounded externally by another tuberosity. A lai'ge 

 longitudinal tuberosity supports the external border of the cuboid facet on the in- 

 ferior side. 



The skull fragments show that this species differed from all of the known Perip- 

 tychida; in having a very high and i-obust sagittal crest. 



Three vertebra^ of the spccimcu described are preserved, the axis, a lumbar and 

 two caudals; all without arches. The axis is about as long as the lumbar, omitting 

 the odontoid process. The latter is rather short and is depressed, the section being a 

 tiansverse oval. Its articular surface is continuous with the atlantal facets. Body 

 with a median iufciior keel. The lumbar is short, but exceeds the axis in ti-ansverse 

 diameter. The articular faces are subplane, while the sides of the ceiitrnin are con- 

 cave, and not keeled at an}- point. '^Pwo strong foramina perfoi'ate the Hoor of the 

 neural canal. The bodies of the caudals are depressed and a little longer than wide. 

 One of them has a median keci-angle below. Other specimens show more distal 

 caudals of elongate form, showing that this species had a long tail like the Phrna- 



o — - — I — 



{anicropol 

 trims vers 



Measurements of sp. No. 1. M. 



LcngUi of superior true molars willi p. m. i ami ii 044 



nnlcroposlorior f07 



ise Oil 



f nnleroposlerior "Id 



Diameters m. i { ,_., 



[ transverse 01.. 



iaiilcropostcrior 010 

 tninsverse 01. i 



f anteroposterior 000 



Diameters m. iii { 



(^ transverse 01 J 



Lcnglli inferior dental series including canine 073 



anteroposterior 008 



r • !' 

 I of canine { 



1' 



Diameters base (,. .,„ ., , 



transverse OOS,) 



Length of true molars 03 1 



f anteroposterior 008 

 transverse <""•> 



f anteroposterior OIO.I 



Diameters m. ii { ,,. 



I transverse '•"' 



f anteroposterior 012 



Diameters m. iii { __,, 



I transverse ""•' 



