GILMORE: the fossil turtles of the UINTA FORMATION 



133 



of the width at the base, and by the close proximity of the anterior end of the ento- 

 plastron to the border of the Up. In the unusual proportions of the anterior lobe 

 it most nearly resembles E. arethusa Hay from the Bridger beds, but is at once dis- 

 tinguished from it by the concave lip, as contrasted with the projecting lip of the 

 former species. In having the humero-pectoral sulcus pass behind the entoplastron 

 this species is distinguished from all other species of the genus with the exception 

 of E. lativertehralis (Cope), E. megaulax (Cope), and E. rivalis Hay. 



This species is dedicated to Mr. Earl Douglass, who collected the type speci- 

 men, as well as the greater number of specimens comprised in this collection of 



turtles. 



9. Echmatemys hollandi sp. nov. 



Plate XXIII, fig. 1; text-fig. 13. 



Type: C. M. No. 3249, consisting of a considerable portion of the carapace, 

 lacking the posterior and the greater part of the peripherals and costals of the 

 left side and the outer halves of most of the remaining peripheral and marginal 



Fig. 13. Echmatemys hollandi. Carapace of the type, C. M. No. 3249. One-third natural size, 

 c. 6, sixth costal; c.s. 1, supernumerary or first costal scute; n. 1, n. 6, first and sixth neurals. 



bones. A considerable part of the plastron is present but the under surface is so 

 badly shattered that nearh^ all traces of the sutures and sulci have been obliterated. 

 The impression remaining in the matrix, however, gives some idea of the shape and 

 dimensions of the anterior and posterior lobes. Collected by Earl Douglass, 1908. 



