1889.] 4iJ ' [Cope. 



sides. The adjacent borders are much inflected with simple deep folds, 

 and there is not represented to be any material diflference between the 

 larger loops towards the inner sides of the lakes. 



The species is one of the smallest of the genus, being about equal to the 

 n. peninsulatum. The crowns are represented to be elongate and but 

 little curved. Grinding face longer than wide, 19 by 17 mm. 



Deposits of Ashley river, near Charleston, South Carolina. The fossils 

 of this deposit are of mixed ages, so that it is impossible to fix its true 

 horizon with certainty. 



HlPPOTHERIUM RELICTUM CopC. 



American Naturalist, March, 1889. 



Crowns of superior molars as broad as. or broader, than long, rather 

 short and moderately curved. Anterior internal column with a broadly 

 oval section, without angle, and well separated fiom adjacent enamel 

 borders. Posterior internal column on the first true molar, projecting as 

 far inwards as the anterior, but broadly connected with the posterior in- 

 ternal crescent. It is not so far inward in the last superior molar, with 

 which it is connected by a rather narrow isthmus. The enamel border of 

 the lakes is very simple, consisting in the first true molar of one or two 

 emarginations of the adjacent faces, and one or more of the remote mar- 

 gins. A loop of the posterior internal border of the lakes is outlined. A 

 small loop directed towards the anterior internal column. Cementum 

 layer thick. 



Dimensions of Molars. 



MM. 



T^. , . r anteroposterior 16 



Diameters m. i ^ * 



I transverse 19 



Diameters m.iii I ^^^^'•"P"^*^"^^ 1' 



I transverse 18.5 



T^. ^ . . c • (anteroposterior 17 



Diameters m. i, inferior-; ^ 



( transverse 8 



Diameters m. iii, inferior \ anteroposterior 18.5 



I. transverse 8 



From a Lower Pliocene bed ( ? Idaho terrane) of the eastern part of Ore- 

 gon. George C. Duncan. 



HlPPOTHERIUM SPHENODUS Cope. 



nippotherium speciosmn Leidy, Cope, Bulletin U. S. Geol. Survey Terrs., 

 • No. 1, 1874. Annual Report U. S. Geol. Survey Terrs., 1873 (1874), 

 p. 522 ; not of Leidy. 



Two superior molars of this species were obtained by me in the same 

 locality as that furnishing the H. paniense, and at the same time. Several 

 years later I obtained two other molars from the same place, viz., the 

 Pawnee Buttes of N. E. Colorado. 



PKOC. AMER. PHIL08. SOC. XXVI. 130. 3e. PRCNTED JUNE 5, 1889. 



