M. E. Thorpe — A Newly Mounted Eporeodon, 311 



Eporeodon socialis is known np to the present by only 

 three drawings, with no text description. The first refer- 

 ence, in which the species was proposed, was in Professor 

 Marsh's monograph on the Dinocerata, in 1884/ The 

 only mention of the species in the text is a line on page 62 

 where the name Eporeodon alone is used, but this refers 

 to figure 73, page 64, which shows a superior view of the 

 skull of this species, with the brain cast in position. The 



Fig 4. 



Fig. 3 



m 17 

 FiG. 3. — Eporeodon socialis Marsh. 

 Fig. 4. — Eporeodon socialis Marsh. 



IE N 

 Left manus. Cotype. 

 Left pes. Cotype. 



After Marsh, x i^. 

 After Marsh, x iJ. 



skull, however, is incorrectly drawn. On page 187 of the 

 same monograph are two woodcuts, the first, figure 162, 

 of the left manus, and the other, figure 163, of the left pes 

 of the same individual. Both of these latter figures are 

 one third natural size and are reproduced in figures 3 and 

 4 of the present paper. 



In the following year,^ Professor Marsh again used the 

 woodcuts of the left pes and manus as figures 128 and 129, 

 without text reference. Until now, therefore, all knowl- 

 edge of this species has been derived from the three 

 above-mentioned woodcuts. Owing to this lack of exact 

 information, it has been erroneously supposed that these 

 cotypes were collected in the John Day basin of Oregon, 



^ O. C. Marsh, U. S. Geol. Survey, Mon. 10. 



2 0. C. Marsh, U. S. Geol. Survey, 5th Ann. Eept., 299, 1885. 



