SYSTEMATIC REVISION 19 



Measurements — Continued. 



"No. I, dorsal vertebra of the smaller individual — Continued. 



Vertical extent of extremity of diapophysis 0.036 



Diameter of centrum: 



Anteroposterior -026 



Transverse 02 7 



Width between inferior extremities of tubercular facets of diapophyses . . . .066 



Width between extremities of zygapophyses 082 



Length between extremities of zygapophyses 042 



"No. 2, a larger individual. 



"Total elevation ... .130 



Diameter of centrum: 



Anteroposterior 02 9 



Transverse °43 



Vertical 039 



Extent of zygapophyses 102 



Elevation of neural spine 026" 



Diadectes latibuccatus Cope. 



Diadectes Cope, Proc. Am. Phil. Soc, vol. xvn, 1878, p. 505. 

 Empedocles Cope, Am. Nat., vol. XIV, 1880, p. 304. 

 Empedtas Cope, Proc. Am. Phil. Soc., vol. xx, 1883, p. 634. 

 Empedias Cope, Proc. Am. Phil. Soc., vol. xxxiv, 1896, p. 442. 

 Diadectes Cope, Proc. Am. Phil. Soc., vol. xxxv, 1896, p. 131. 



Type: A fragmentary maxillary bone. No. 4377 Am. Mus. Nat. Hist. Cope 

 Coll. From Texas. 



Original description: "On comparison with the corresponding portion of the 

 jaw of D. sideropelicus, the following characteristic marks appear: The tooth line 

 diverges much more strongly inwards from the maxillary border in the D. latibuccatus, 

 leaving a wide groove between the two. This groove is separated by a narrow 

 horizontal partition from a corresponding one on the 

 superior face of the same element, and its surface is AL— " "11^1^ ^*^ 

 longitudinally roughened. The teeth are closely placed, 



and the series turns with the anterior extremity of the V^# ; \# ; >raC^jK-^jfi 

 jaw, abruptly inwards. The transverse diameter of the )VmV Ky 

 teeth lessens to just posterior to the point of curvature, 

 so that their section is nearly round; at and anterior to 

 the curve, the wide transverse diameter is resumed, the Fig. 2— Anterior half of right maxillary 



ill J 1 • 1 f -O :*U of D. latibuccatus. X $. 



last alveolus preserved making an angle ot 45 with * 



. r . r 1 • T-I 1 T yP e No - 4377 Am - Mus ' 



those in the posterior part of the jaw. 1 he external 



surface of the maxillary bone is roughened, as is also the case in the D. sidero- 

 pelicus with coarser and finer irregular impressions, fossae, and grooves. 



"Measurements. ., 



M 



"Width of jaw at ninth tooth from curve 0.036 



Width of ninth tooth from curve oil 



Width of fourth tooth from curve 006 



Width of tooth at curve 008 



Width of third tooth anterior to curve 010 



Width of jaw at curve 019 



Elevation of alveolar part of jaw 018 



Three teeth in 015" 



In the "American Naturalist" for 1880 Cope referred this species to the genus 

 Empedocles, apparently having decided that the anterior teeth were incisors and not 

 canines. 



