NO. 8 MAMMALIAN FAUNA, BADWATER AREA GAZIN 23 



HYRACODONTIDAE 



EPITRIPLOPUS?, sp. 



Plate I, figure 4 



A lower jaw fragment with a well-worn cheek tooth, U.S.N.M. 

 No. 21099, evidently a molar, and fragments of two lower molars 

 belonging to another specimen are surely rhinocerotid and would ap- 

 pear to be hyracodont rather than hyrachyid. I am, nevertheless, un- 

 able to determine whether the form represented is Prothyracodon, 

 Triplopus, or Epitriplopiis. The Badwater teeth are closer in size to 

 those in Epitriplopiis iiintense than they are to those in Prothyracodon 

 obliquidens. The teeth also strongly resemble, but are much smaller 

 in size than in the Lapoint hyracodont which Peterson unfortunately 

 named Mcsamynodon mcdiiis. The lower tooth in No. 21099 measures 

 16.2 mm. long by ii.i mm. wide. 



Dr. H. E. Wood concurs with me that, of the various possible alloca- 

 tions which may be made of this material, Epitriplopiis is the most 

 probable. 



ARTIODACTYLA 

 DICHOBUNIDAE 



PANTACEMYLUS?, sp. 



A homacodont that may well be Pentacemyliis is represented by the 

 posterior two-thirds of M3. There is no certainty, however, that the 

 form is not Mytonomeryx. The tooth conforms closely in form of 

 cusps and is only very slightly smaller than in Pentacemylus pro- 

 gressus. It does not appear to represent the smaller Bunomeryx. 



APRICULUS,^ new genus 



Type. — Apricuhis praeteritus, new species. 



Generic characters. — Simple conical cusps on upper molars as in 

 Helohyiis, but these teeth more nearly quadrate with large lingually 

 placed metaconule on all three. Cingulum continuous around molars 

 without external styles and without evidence of a hypocone. Proto- 

 conule slightly better defined than in Helohyiis. P* with single primary 

 cusp and deuterocone. 



Discussion. — Apriciilus is almost certainly a descendant of Bridg- 

 erian Helohyiis and belongs in the Helohyinae, but its trend has been 



'' Apriculns, diminutive of /Ipcr (L.), wild boar. 



