PALEOCENE MAIVIMALS OF CENTRAL UTAH GAZIN 



15 



from a slight posterior cingulum, does not appear to be placed quite 

 so far internally, and the outer walls of the protoconid and hypo- 

 conid are not so nearly vertical as in Eudaemonema and El/pidophorvs, 

 but seem to be more sloping, causing at least the talonid basin to 

 appear slightly narrower with respect to the width of the tooth. 

 The anteroposterior and transverse diameters of the lower molar, 

 No. 16220, are 3.4 and 2.9 mm., respectively. 



Mixodectid 7 (b), genns and species andetermined 



A maxillary portion, No. 16200, with an upper molar, possibly 

 M- (fig. 7), and part of the next succeeding tooth may represent a 

 small mixodectid in the Wagonroad fauna. The molar shows a 

 well-developed shelf like cingulum external to the par- 

 acone and metacone and acute external styles. The 

 hypocone is markedly lingual in position and a cin- 

 gulum is continuous around the inner portion of the 

 protocone, not including the hypocone but appar- 

 ently terminating posteriori^'- and upward between 

 the protocone and hypocone. A posterior cingulum 

 extends laterally from the hypocone. The lingual 

 position of the hypocone suggests a relationship to 

 Eudw )nonema, inasmuch as in EJpklojihorus the hy- 

 pocone is not placed so far inward. The cingular shelf 

 on the outer side of the tooth seems more prominent 

 than in either of the Crazy Mountain forms. 



The occurrence of this small form in the Wagon- 

 road fauna is of interest, being unlike anything in 

 the Puerco and if found to represent a mixodectid 

 it is the earliest known. 



The tooth measures about 3.3 and 5.4 mm., anteroposteriorly and 

 transversely. 



TAENIODONTA 

 Genus CONORYCTELLA "> Gazin 



CONORYCTELLA DRAGONENSIS « Gazin 



Conoryctella dragonensis Gazin, 1939b, p. 276. 



A conoryctid type of taeniodont is recognized in the Dragon collec- 

 tions by a maxillary portion with three teeth, P* to M^, and a 

 lower jaw fragment with a single molar obtained in 1938, and two 

 additional lower molars found in 1939. 



The upper teeth, No. 15704, made the type of Conoryctella dragon- 

 ensis (fig. 8), are seen, as previously described, to be a little smaller 



Figure ?.■ — Mixo- 

 dectid? (b): Max- 

 illary portionwith 

 one upper molar 

 and part of an- 

 other (U.S.N.M. 

 No. 16200), oc- 

 clusal view, X 4, 

 Wagonroad Pa- 

 leocene, Utah. 



'^Cononjctes + eUa, a small conoryctid. 

 ° Named for Dragon Canyon. 



