Cope.] 346 
[Jan. 5, 
Measurements. 
M. 
Total length mandibular ramus............... 0267 
me of tooth line..... Selig see VORY eC ee 7A0, 
Transverse diameter of symphysis....... a8 . iat 8 
oe 4 base of tooth. aed ou wee. 004 
Length. premamxillarys<sise il... tid do Hates 03) 068 
is i to large ool: a etd : bdesnOb 
Greatest depth ‘ a es ie euricit018 
Diameter large tooth at ioe Be A oe LOOY 
Length maxillary to first tooth.... Ae : ae ela 
Depth a Abe t i ARIS cA 68 in er 010) 
2 n atlast. ‘fa. 2 + deed 401A: 
es articular surface. (orm hi ete ee ane 0245 
Found by the writer near Fossil Spring, near Fort Wallace, in Western: 
Kansas. 
PACHYRHIZODUS KINGII. Cope. sp. nov. 
Established on the proximal portion of a maxillary bone with the articu- 
lar 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 sub-crescentic, while the insertion-like 
tuberosity is nearer to it, and on the inner edge of the outer face, and con- 
nected with the articular face by a ridge, 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 longitudinally, and transverse or 
obliquely. 
M. 
Total depth of bone at-articular face... 4s «e+ sicareies ow eee On. O22 
Dept Ab TEMGO TOO cigs 9 s,s senpecoe singles, ME he flee Eueaye) ants ® 0155 
This species was found near the preceding. It is dedicated to Doctor 
William Howard King, Post Surgeon at Fort Wallace, to whom, and not 
less to his excellent wife, I am indebted for hospitality and other assist- 
ance of a kind essential to the success of my explorations in Western. 
Kansas. 
PACHYRHIZODUS LATIMENTUM. Cope. sp. nov. 
Represented by a right ramus mandibuli with the angle and cotylus 
deficient. The posterior portion of the dentary is also wanting, so that 
the number of teeth it supported is not ascertainable. The general form. 
appears to have been deeper than in the P. caninus, while the size of the 
teeth is similar. The external face of the bone near the alveolar border 
is convex, and not particularly rugose. The external alveolar wall is 
well elevated above the inner. Below the latter, the dentary bone ex— 
