IIG Annals of the Carnegie Museum. 



see page 122, is provisionally included, while the so-called tertiary 

 tapir Leptolophiodon (Isectolophns) annectens (Rutimyer) vide p. 126, 

 is doubtfully included. 



This family may be subdivided into two subfamilies, the Ilonw- 

 galaxincc, nom. nov., defined by Osborn & Wortmann under the name 

 SystemodontincB {op. cit., p. 124) which cannot be used since the genus 

 Systemodon has been transferred to the Equidce, and the Isectolophince, 

 subfam. nov. 



Subfamily HOMOGALAXIN^ nom. nov. 

 (Type Gen. Homogalax Hay, non Systemodon Cope). 



''Dentition: f, \, ^, |. Superior dental series continuous. First 

 lower premolar contiguous to canine, followed by narrow diastema. 

 Third 'and fourth superior premolars with two external cusps and a 

 single internal lobe. Paracone and metacone subequal, conic. Proto- 

 loph and metaloph complete. Large third lobe upon third lower molar."^° 



ISECTOLOPHIN.-E subfam. nov. 

 Small Perissodactyls of the middle and upper Eocene with dentition 

 -|> T' T' I- Pai'd- and metacones subequal and subconic. P- with two 

 internal cones. P~ with one internal cone. With or without diastema 

 hack of loiver canine. Cross-crests of lower molars more or less perfectly 

 developed. Connecting crests hetiveen proto- and hypoconids. Large 

 hypoconulid on M^. 



Genus Isectolophus Scott and Osborn. 

 35. Isectolophus annectens Scott & Osborn (Plate XLI\', Fig. i). 



Proc. Amer. Philos. Soc, Vol. XXIV, 1887. p. 260. "The Mammalia of the 

 Uinta Formation." Trans. Amer. Philos. Soc, Vol. X\'I, 1889, p. 520, PI. X, 

 Figs. 1-8. 



Type: Upper and lower teeth No. 10400, Princeton Museum Cata- 

 logue. 



Llorizon: Uinta Eocene. Near base of Horizon C? 



Locality: White River, Utah. 



Hypotypes:^^ A crushed skull with fragments of the lower jaws and 



* Osborn & Wortman (I. c.) defined the subfamily Syslemodonlince basing their 

 definition upon material representing Homogalax, and, as Systemodon is now referred 

 to the Equidce, I propose the change here made. 



^^ The definition is quoted from Osborn & Wortman. 



^' Fragments of lower jaws. No. 1828 in the American Museum Collection, which 

 were found in horizon C, near Wagon Hound Canyon on White River, I^Tinta County, 

 Utah, are here provisionally associated as hypotypcs. 



