34 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



from it, though not great, are rather generally toward the anapho- 

 morphids, somewhat suggestive of Absarokius in the character of P4 

 although this tooth is not nearly so enlarged. This would seem to 

 add another instance to the maze of developmental trends that tend 

 to complicate taxonomy, emphasizing its arbitrary nature, particularly 

 noticeable in the Primate order. 



MEASUREMENTS IN MILLIMETERS OF LOWER TEETH IN 



Chlororhysis knightensis 



U.S.N.M. 



U.S.N.M. No. U. of C. 



No. 21901 No. 



2238s Type 46705 



C, anteroposterior diameter at 



cingulum i.i 



P2, anteroposterior diameter: 



transverse diameter 1.3 : i.o 



Pa, anteroposterior diameter : 



transverse diameter 1.8 : 1.4 



P« , anteroposterior diameter : 



transverse diameter 2.0:1.7 2.0:1.8 



Ml, anteroposterior diameter : 



transverse diameter 2.1 : 1.7 2.2 : 1.7 



M2, anteroposterior diameter : 



transverse diameter 2.3 ': 1.7 



Ms, anteroposterior diameter : 



transverse diameter 2.4 : 1.5 



* Approximate. 



ANAPTOMORPHIDAE 

 ANEMORHYSIS SUBLETTENSIS (Gazin) 



(Plate 3, figure i) 



Following description of Anemorhysis sublettensis (1952, p. 24) 

 as a possible form of Paratetonius, it was realized that the type of 

 Paratetonius, P. steini, was not distinct from Tetonius homunculus. 

 As a consequence the name Anemorhysis was proposed (1958, p. 25) 

 for the La Barge form and to this genus was allocated the Lysite 

 species "Tetonius" muscidus Matthew (pi. 3, fig. 2). No new ma- 

 terial of A. sublettensis has come to light but specimens representing 

 a form that may be closely related were found in the lowermost beds 

 of the Knight near Bitter Creek. These are described below. 



TET0N0IDES,7 new genus 



Type. — Tetonoides pearcei, new species. 



Generic characters. — Resembling Tetonius but P4 relatively much 



■^ From its resemblance to Tetonius. 



