with Descriptions of Neiv Species. 231 



Promerycoclioerus lulli, sp. nov. 

 (Figs. 1 A, B.) 

 Holotype, Cat. No. 10234, Y. P. M. Turtle Cove, John Day Kiver, Oregon. 

 Ui^i^er Oligocene (middle John Day). 



.Specific characters. — Lacrymal foss^ very deep and 

 large ; skull long and slender ; face narrow ; orbits look 

 cliiefly outward, but slightly forward and not upward; 

 infra-orbital foramina small and located above P^ ; sagit- 

 tal crest very high and thin above posterior part of cran- 

 ium, posteriorly curving over along the transverse crests, 

 which are thin and close together; malar below orbit 

 very thin but mde, posterior part of zygoma vertical, 

 with crest rising nearly to the level of the squamous 

 suture, and outer border rounded; masseteric fossae 

 shallow ; face deep ; muzzle square ; inferior incisors 

 crowded; bullas large, extending to level of postgienoid 

 processes ; paramastoid and postgienoid processes very 

 nearly close auricular fossa below; zygomatic arches 

 originate above anterior portion of M^, with convexity 

 extending forward for short distance ; cranium parallel- 

 sided up to squamous suture, in front of which is marked 

 groove ; occiput above foramen magnum very narrow and 

 convex, with exceedingly deep lateral fossae. 



The skull, jaws, and cervicals are still united by matrix. 



The species is named in honor of Professor Richard 

 Swann Lull. 



Measurements of Holotype. ^^^ 



Total length of skull 378 



Bipostglenoid diameter 97 



Bizygomatic diameter 195 



Max. diameter of postgienoid process 27 



Length of liyoid bones 71 



Length of superior molar series 85 



Length of superior premolar series 76 



Length of superior dental series, inc. canine . . . . : 186 



Depth of malar below middle of orbit 51 



Max. width of cranium 65 



Diameter of postorbital constriction 51 



Max. height of zygoma above glenoid surface 58 



Width of frontal above middle of orbit 100* 



Height of skull above parapet of M'^ 109 



Width of face at infra-orbital foramina 65 



Depth of paramastoids below postgienoid process 29.5 



Length of inferior molar series 88 



Length of inferior premolar series 84 



Depth of ramus from condyle to angle 139 



Length of ramus 290 



* Approximate. 



Am. Jour. Sci.— Fifth Series, Vol. I, No. 3.— March, 1931. 

 16 



