Peterson: Material Discovered in Uinta Basin. 117 



fragnienls of limb-bones, C. M. No. 3030. Right maxillary with 

 cheek-teeth in place, C. M. No. 2337. 



Horizon: Uinta Eocene. Near base of Horizon C. 



Locality: On the Duchesne River, six miles east of Myton, Utah, 

 and eastern end of Uinta Basin near Kennedy's Hole. 



Generic Characters: {I. ? f , Cy, -Pf, M^. Long diastema back of lower 

 canine.^^ P- with two internal tubercles. P- ivith one internal tubercle. 

 Meta- and paraconcs of equal size. Ectoloph extended well back of 

 protoloph. Paraslyle large and well separated from paracone. Cross- 

 crests of molars comparatively sharp, ilf-g- imth large hypoconulid; 

 connecting-crests between proto- and hypoconids of molars. "Lunar 

 with subequal magnum and cuneiform facets. Cuboid broad ivith an 

 extensive astragalar facet. Manus and pes. Digits, 4 — ? J."^^ 



Provisional Specific Characters: Long symphysis back of lower canine; 

 the latter tooth proportionally small. Symphysis long and laterally 

 constricted.^'^ 



The mashed cranium, No. 3030 and the maxillary, No. 2337, in 

 the Carnegie Museum set definitely at rest the question of the upper 

 premolar teeth of Isectolophus. Unfortunately the skull of No. 3030 

 when found was completely disintegrated in front of P-. No part 

 of the front of either upper or lower jaws was obtained. 



The present material agrees very well with the description and espe- 

 cially with the illustrations by Professor Osborn and serves well as 

 a hypotype of this genus. 



In reexamining the type of Isectolophus annectens I find a portion of 

 a premolar, which Osborn mistakenly referred to P-, but which in 

 reality compares exactly with P- of the specimen in the Carnegie 

 Museum. Hatcher has correctly identified this tooth-fragment.'* 

 There is a single tooth with the type specimen, which is apparently 

 M- of the right side. The upper teeth described by Osborn as M- 

 and M- agree better with M- and M- of the Carnegie Museum speci- 



'2 As shown by the specimen of Isectolophus in the collection of the American 

 Museum of Natural History, No. 1828. 



*' The generic characters inside of quotation marks are according to Osborn 

 (Trans. Amer. Philos. Soc, Vol. XVI, 1889, p. 519), and are based upon what is 

 now regarded as a separate species, Isectolophus scotti. 



'^ If it be hereafter found that complete specimens of Isectolophus annectens 

 have this long diastema, then Isectolophus scotti, vide p. 120, must be raised to 

 generic rank. 



^^ "Recent and Fossil Tapirs," Amer. Jour. Sci., \'ol. I, 1896, p. 177. 



