223 



Measurements. 



ii. 



Total length of tho mandibular ramus 0. ',207 



Total length of tho tootli-lino 0. 170 



Transverse diameter of tbe symphysis 0. 0W 



Transverse diameter of tho base of a tooth 0. 004 



Length of tho premaxillary , 0. 0G!3 



Length of the premaxillary to tho largo tooth 0. 010 



Greatest depth of tho premaxillary 0.0VJ 



Diameter of tho large tooth at Ibe base 0. 007 



Length of tho maxillary to tbe first tooth 0. 171 



Depth of tho maxillary at tho first tooth 0. 019 



Depth of tbe maxillary at tho last tooth 0. 014 



Depth at tho articular surface 0.0245 



Found by the writer near Fossil Spring, near Fort Wallace, in Western 

 Kansas. 



Pachyehizodus kingii, Cope. 



Established on the proximal portion of a maxillary bone with the articular 

 surface and bases of twelve teeth. It is a species of nearly the same size as 

 the last ; but the bone contracts more rapidly than in that one, and presents 

 a stronger interior longitudinal ridge. The superior articular face is smaller 

 and narrower, being subcrescentic, while the insertion-like tuberosity is nearer, 

 and on the inner edge of the outer face, and connected with the articular face 

 by a ridge, and not separated by a groove, as in P caninus. The outer face is 

 depressed below the articular face much more than in that species, so that 

 its lower portion becomes more convex. The roots of the teeth are of the 

 same length as in P. caninus, and, as they are more numerous, they are more 

 closely packed and more cylindric. Their pleurodont character is also more 

 strongly marked. The superior surface of the bone is striate-grooved longi- 

 tudinally, not transversely nor obliquely. Total depth of bone at superior 

 articular face, m .022 ; depth at tenth tooth, m .0155. 



This species was found near the preceding. It is dedicated to Dr. 

 William Howard King, post-surgeon at Fort Wallace, to whom, and not less 

 to his excellent wife, I am indebted for hospitality and other assistance of a 

 kind essential to the success of my explorations in Western Kansas. 



Pachyehizodus latimentum, Cope. 



Represented by both mandibular rami and numerous lateral cranial bones 

 of a specimen from the Solomon River, and a portion of a mandible from the 

 Smoky Hill, Kansas. The rami are relatively deeper than those of P. ca?iinvs; 



