GILMORE: the fossil turtles op the UINTA FORMATION 107 



Family BAENID.E Cope. 



In the present collection from the Uinta formation of Utah nineteen specimens 

 were sufficiently well preserved to be identified as pertaining to the genus Baena. 

 These were found in all three subdivisions of the Uinta, being distributed as follows: 

 one specimen, Baena inflata, from Horizon A; thirteen from Horizon B; two from 

 horizon C; and three for which the data for the horizon were uncertain, or not given. 



Five species of this genus are now recognized as occurring in the Uinta forma- 

 tion, three of which are here described as new. Only one of the recognized species, 

 Baena arenosa, is found to occur in other geological epochs, and no member of this 

 family is known to range above the Uinta. 



Genus Baena Leidy. 



1. Baena arenosa Leidy. 



Plate XVIII, fig. 1; text-fig. 1. 



Baena arenosa Leidy, Proc. Acad. Nat. Sci. Phila., 1870, p. 123; U. S. Geol. Surv. 

 Wyoming, etc., 1870 (1871), p. 367; U. S. Geol. Surv. Montana, etc., 1871 

 (1872), p. 368; Contrib. Ext. Vert. Fauna West. Terrs., 1873, pp. 161, 343, 

 pi. 13, figs. 1-3; ?pl. 15, figs. 1-5; pi. 16, figs. 8, 9.— Cope, ?Append. LL of 

 Ann. Report Chief of Engineers, 1875, p. 96; ? Wheeler's Surv. 100th Merid., 

 1877, p. 52, pi. 24, fig. 32.— Baur, Proc. Acad. Nat. Sci. Phila., 1891, p. 426. 

 —Hay, Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 437; Foss. Turtles of 

 N. A., 1908, pp. 67-71, pi. 12; pi. 13, fig. 1; pi. 14, figs. 1-3, text-figs. 44-51. 



Baena affinis Leidy, Ann. Report U. S. Geol. Surv. Wyoming, etc., 1870 (1871), 

 p. 367. 



This species is represented in the collection by a single specimen, Cat. No. 2356. 

 Collected by Earl Douglass and party, June 18, 1908, from Horizon B, Uinta 

 formation. Upper Eocene, east of Dragon- Vernal road between White and Green 

 Rivers, Uinta Basin, Uinta County, Utah. 



The specimen consists of a fairly complete carapace, lacking the posterior 

 borders and the peripherals of both sides, the plastron lacks portions of both 

 anterior and posterior lobes. It represents an individual of approximately the 

 same size as the type of the species (Cat. No. 103, U. S. National Museum), with 

 which it has been carefully compared. This comparison shows several differences, 

 but such as exist are not considered of sufficient importance to separate the speci- 

 mens specifically. The sculpture of the carapace is rough and uneven, consisting 



