12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I3I 



P" in the specimen compared with E. parvus is distinctly more pro- 

 gressive looking than in No. 21092 helieved close to E. gracilis. The 

 anterointernal cusp is clearly defined on a crest extending postero- 

 lingually from a position anterior to the lingual surface of the para- 

 cone, somewhat as it appears in the type of E. parvus, but with the 

 long diameter of the cusps directed a little more transversely than in 

 the latter, so that the anterior portion of the tooth seems broader. 

 Moreover, the outer wall shows evidence of an incipient mesostyle, 

 better developed in the type, but no trace of which was found in P^ 

 of No. 21092. P^ in No. 21091 measures 6.1 mm. long by 5.1 wide 

 transversely ; P^ is 6.7 by 6.9. 



The lower molariform tooth is quite like that (No. 21094) com- 

 pared to E. gracilis but distinctly smaller. It measures 7.8 mm. long 

 by 6.3 wide, comparing favorably in length, but a little broader than 

 molariform lower teeth in A.M. No. 2066 referred to E. parvus. 



BRONTOTHERIIDAE 



A fragmentary maxillary portion without teeth but showing root 

 portions of the canine and first two premolars would appear to be of a 

 titanothere. Speculation as to the genus represented would be un- 

 warranted. Enamel fragments of large teeth in the collection may also 

 be titanothere, but this is uncertain as they might equally well repre- 

 sent an amynodont rhinoceros. 



The Bad water specimen cited by Wood, Seton, and Hares (1936) 

 as Telmatherium, cf. cultridens is half of a lower molar which W. K. 

 Gregory, in a note to Wood, observed, "Granger and I found this tooth 

 to be close to M, of referred specimens of Telmatherium cultridens." 

 There is, of course, a close resemblance ; nevertheless, from the very 

 fragmentary nature of the specimens it is extremely doubtful if among 

 the several genera of Uintan titanotheres all can be excluded from 

 consideration. The specimen from Lysite Mountain identified by 

 G. E. Lewis (in Tourtelot, 1948) as Telmatherium, cf. cultridens I 

 have not seen. It could not be located in the collections at Yale Pea- 

 body Museum. 



CHALICOTHERIIDAE 



EOMOROPUS ANARSIUS,^ new species 



Plate 2, figures 1-3 



Type. — Greater part of left side of skull and left ramus of mandible, 

 U.S.N.M. No. 24097. 



* Anarsios (Gr.), incongruous, strange — in allusion to the large and unex- 

 pected canine. 



