K. L. Troxell — Entelodonts in Marsh Collection. 245 



Skull length, condyles to in- 

 cisor border 



Width across muzzle at 



alveolus of P 2 



Width of rami back of an- 

 terior tubercles 



Depth of ramus at P, .... 

 Depth of ramus at M, .... 

 of P 4 , transverse., 

 of P 4 , ant.-post. . . 

 transverse, 

 ant.-post. . 

 Upper premolar length .... 

 Upper molar length 



Diameter 

 Diameter 

 Diameter of M 

 Diameter of M 



Diameter of P 4 , transverse., 

 Diameter of P 4 , ant.-post.. 

 Diameter of M 2 , transverse, 

 Diameter of M 2 , ant.-post. 

 Lower premolar length 

 Lower molar length 



^ CD 



I* 



SS o 



540 



80.6 



til 

 mm. 



<s> o 



.|«J CD 



^ ojd 

 mm. 



760 



96.0 



o 



* 



80.0 



<o P-i 



o o 



i-a 



r^S CD 



O bo 

 mm. 



610 



85.5 



64.6 



78.0 





75.0 



62.0 



62.0 



92.0 





74.0 



83.0 



75.0 



109.0 





76.0 



83.0 



27.8 





34.0 



39.0 



34.6 



28.6 





31.0 



35.0 



30.0 



32.3 





42.5 



45.0 



43.0 



29.3 





40.0 



42.2 



36.0 



130.0 





186.0 





155.0 



82.8 



..... 



112.0 



117.0 



105.0 



18.4 



?23.0 



*33.5 



29.0 



27.0 



34.0 



41.4 



*53.0 



44.0 



35.0 



23.8 



28.6 



*39.5 



34.7 



31.0 



30.4 



35.4 



*54.0 



43.0 



35.5 



149.0 



200.0 





189.0 



166.0 



88.4 



108.5 





126.5 



107.0 



* Ammodon leidyanus, holotype and paratype. 



Two new genera, four new species, and one new sub- 

 species have been made in order to establish certain new 

 features not heretofore known in the Entelodontidse. 

 The concluding sections of the paper are concerned with 

 the detailed description of the types and the more import- 

 ant specimens in the collection. 



Bibliography. 



The following references, taken mostly from the notes of Miss Lucy 

 Peck Bush, are presented to supplement the long bibliography published by 

 Peterson in 1909. 



Andrese, Achill. 1884. Beitrag zur Kenntniss des Elsasser Tertiars. Theil 

 II, Die Oligocanschichten im Elsass, pp. 31-32, pi. 11, fig. 19. Strass- 

 burg. Also published in Abh. z. geol. Specialkarte von Elsass-Lothr.. 

 2. Bd., 3. lift., 1884. 

 Describes Entelodon magnus Aymard. 



Barbour, E. H. 1912. Skull of the giant hog Elotherium. Nebraska Geol. 

 Survey, 4, pt. 4, 50-51. 



Bronn, H. G. 1853-1856. Lethaea Geognostica, 3d ed., Bd. 3, 901-905, pi. 

 51, fig. 1, and liv., fig. 2a-e. Stuttgart. 



Cook, H. J. 1912. Faunal lists of the Tertiary formations of Sioux 

 County, Nebraska. Nebraska Geol. Survey, 7, pt. 5. 

 EntelodoiitidaB listed on pp. 35, 37, 39, 41, 42- 



