776 THE WHITE EIVER FAUNA. 



EXOSTINUS SEERATUS Cope, 



Locia citatia. 

 Plate LX; figs. 12-14. 



A series of tubercles along each supraorbital border, longitudinal at 



the front, and quadrate at the back part of the eyebrow. A single series of 



tubercles separates them. Five tubercles in a transverse row at the posterior 



margin of the frontal. Two series of flat tubercles on the zygomatic bone. 



Dentary quite convex on outer face ; inner face slightly convex ; 8 teeth in 



.0050. 



Measurements. 



ii. 



Length of frontal (nearly complete) 0.0070 



Width of frontal posteriorly 0034 



Width of frontal at postorbital point 0045 



Width ef frontal between orbits 0018 



Length of zygomatic 0070 



Depth of dentary at last tooth 0030 



Length of a mandibular tooth 0018 



About the size of the large males of the northern Anolis principalis. 



ACIPRION Cope. 



Synopsis New Vertebrata of Colorado, 1873, p. 17. Annual Report U. 8. Geol. Surv. Terrs., lB73 (1874) 



p. 514. 



Represented by a dentary bone, with nearly all of the teeth remaining. 

 A groove, apparently the Meckelian, extends along the inferior border of 

 the distal half of the bone. The teeth are truly pleurodont, closely placed, 

 and cylindric, with compressed crowns. The latter supports a large median 

 and two small lateral cusps, three in all. 



ACIPRION FORMOSUM CopC. 

 Lo(Aa citatia, 

 Plate LX; fig. 15. 



The crowns project well above the alveolar border. External face of 

 dentary smooth, with rather distant foramina. Ten and a half teeth in 



o-^.ooso. 



Measurements. 



M. 



Depth of dentary at middle 0.0022 



Length of a median tooth 0018 



Elevation of same above alveolus 0010 



