J. B. Hatcher — Two New Ceratopsia. 417 



Diceratops hatcheri Lull, gen. et sp. nov. 

 Plate XIII, Figures 3 and 4. 



Mr. Hatcher's description is as follows : 



"Char. Generic: Nasal horn core absent. Squamosal bones pierced by large 

 fenestra, while smaller ones penetrate the parietals. The inferior border 

 of the squamosal lacks a quadrate notch. 



Type JSTo. 2412, U. S. National Museum. 



"Char. Specific: Supraorbital horn cores short, robust, and nearly circular 

 in cross-section at base, erect and but slightly curved. Orbits project 

 in front of the horns, the frontal region lying between the horns being 

 concave. Exoccipital processes slender and widely expanded. 



" The type, No. 2412, of the IT. S. National Museum, con- 

 sists of a skull without the lower jaw. The posterior portion 

 of the frill is somewhat weathered but the specimen appears 

 to have suffered comparatively little from crushing. 



" Locality : The specimen was found in a hard sandstone 

 concretion about three miles southwest of the mouth of Light- 

 ning Creek, Converse County, Wyoming. When found the 

 concretion in which the shell was imbedded had entirely weath- 

 ered out of the surrounding sandstone and stood at an altitude 

 of five or six feet above the ground, firmly attached beneath 

 to another concretion. The skull stood on its nose with the 

 frill pointing upward. 



" The Skull : The chief distinctive features of the skull are 

 as follows : The supraorbital horn cores are comparatively 

 short, robust, and nearly circular in cross-section at the base 

 instead of compressed, as in most other species. They rise 

 more directly upward than in other species and are only slightly 

 curved. The orbits also occupy a position more anterior 

 than that seen in other species ; the anterior borders of the 

 horn cores rise from about the middle of the superior borders 

 of the orbits so that the orbits project well in front of the 

 horns. The frontal region between the orbits is concave. 

 The exoccipital processes are rather slender and widely ex- 

 panded. 



" The nasals terminate anteriorly in a rounded rugosity not 

 developed into anything approaching a nasal horn and resem- 

 bling that of the type of Triceratops obtusus. The rostral bone 

 is small and firmly coosified with the premaxillaries. The lat- 

 ter are elongate but not deep. The maxillaries are massive 

 and the lachrymal foramen is elongate and below and com- 

 siderably forward of the orbit. The jugal is broad distally 

 and firmly coossified with the epi jugal. The lateral temporal 

 fossa is nearly as deep vertically as longitudinally. The squa- 



