24 KANSAS UNIVERSITY QUARTERLY. 
Portheus Lowii sp. nov. 
This species is based upon the dentary bones of a single indi- 
vidual. They were found at Fairbury, Nebraska, in the same 
horizon of the Fort Benton, with Desmatochelys lowii Williston 
and were sent to the museum by Mr. M. A. Low of Topeka in 
whose honor the species is named. Special interest is attached to 
this species as it is the first time the genus Portheus has been 
reported from so low a horizon as the Fort Benton. 
The dentary is short with a symphysis more oblique than in any 
other species of Portheus which I have examined. It is also not 
so roughly marked for the attachment of the ligaments binding the 
jaws together as in Portheus molossus. The alveolar border is 
shorter and not so thick proportionally as in this species. The 
groove for Meckel’s cartilage is very shallow and the swelling of the 
alveolar border just back of the symphysis is but shghtly developed. 
The posterior extremity of the alveolar border is projected upward 
into a short coronoid process, which is but slightly bent outward. 
The teeth are slightly oval in cross section, and non-striate. At 
the extremities the crowns are acutely pointed and curved slightly 
backward. The arrangement of the teeth is as follows: one large, 
two small, one large, and ten or eleven medium large and small. 
Measurements are as follows: 
MM. 
Iseneth tof salveolar borden ic) .c.0! 3h. eereee aa eee pee eee 177 
ene thvorsymphysisitai pcs G4 aoe owe Nace See re hee eee 79.5 
Depth of.dentary at smmiddle We. na. Gel eae rete ers ee ae 64.5 
Depth ofidentary. just: back ob Symipbysis |e cass nee ee a OS 
Daptinus broadheadi, sp. nov. 
Established on the left superior maxillary and one of the pre- 
dentaries. The remains were found in Wallace county, Kansas, 
by Mr. Geo. W. Cooper. Named in honor of Prof. G. C. Broad- 
head of Columbia, Mo. 
The maxillary is less elongate and ends more abruptly than in 
Saurocephalus. The anterior border slopes forward more obliquely 
than in Portheus. The premaxillary surface is continuous with the 
outer surface of the maxillary, which surface is provided with small 
tubercular protuberances probably fitting into corresponding de- 
pressions on the premaxillary. It is seen from the above that the 
premaxillary is not so immovably fixed as in Portheus, where the 
premaxillary fits into a deep depression of the maxillary and has a 
thin lamina of bone extending forward nearly to the extremity 
supporting it. The ramus is thin above and thickens but slightly 
at the alveolar border. The bone does not materially thicken 
