FORT UXIOX OF CRAZY MOUXTAUST FIELD, MONT. 



169 



case P. rex (Gidley) has long priority. If, however, all the material 

 described above belongs to P. rex, it is almost surely distinct from 

 P. anceps, and even if this is not the case it is not certain from the 

 types that they are the same. In any event it is preferable to retain 

 the name P. anceps for the present, as it is a well-lmown and well- 

 characterized species, whereas P. rex is as yet very poorly known and 

 its specific characters are not really established. The difference in 

 stratigraphic level between the horizons of the two types is nearly a 

 thousand feet. 



Order TAENIODONTA Cope, 1876 



Family STYLINODONTIDAE Marsh, 1875 



Matthew (Pale. Mem.) is followed in referring all 

 taeniodonts to a single family (with four subfamilies). 

 This is an extremely rare group in this fauna, with only 

 four specimens in the National Museum collection. 



Subfamily Conoryctinae Matthew, 1937 

 (Conoryctidae Wortman, 1896) 



Genus CONORYCTES Cope, 1881 



CONORYCTES COMMA Cope, 1881 



Figure 34 



Figure ^i.— Conoryctes 

 comma Cope, U.S.N.M. 

 no. 9597, upper molar: a, 

 External view; b, crown 

 view. Natural size. 



Wortmann and Matthew recognized only one species of Conoryctes 

 in the Torrejon, and as far as I know none has ever been described from 

 any other formation. U.S.N.M. no. 9597, an isolated upper molar 

 from the Gidley Quarry; no. 9678, isolated P^ from the Silberhng 

 Quarry; and no. 9816, two upper molars from Loc. 6, seem to be in- 

 distinguishable from Torrejon specimens. No. 9826, from Loc. 28, a 

 higher level, may belong to Conoryctes but is not determinable. 



Subfamily Psittacotheriinae Matthew, 1937" 



Genus PSITTACOTHERIUM Cope, 1882 



PSITTACOTHERIUM MULTIFRAGUM Cope, 1S82 



Douglass (1908, p. 22) recorded a Calamodon in the Fort Union, 

 querying the generic reference. Matthew (1914, p. 390) commented 

 on Douglass' pubUshed data that this material "agrees better with 

 Psittacotherium." In the National Museum collection there is a speci- 

 men, no. 6162, from the level of and near the Silberling Quarry, which 

 includes parts of two canines, two complete cheek teeth, and other 



'" Matthew (Pale. Mem.) places the calamodonts and stylinodonts in the Stylinodontlnae and separates 

 the psittacotheres as a distinct subfamily. 



