NO. 1009. XEW i^PKCIES OF LEATHERBACK TVRTLE^PALMER. 373 



PSEPHOPHORUS sp., Lydekker. 

 I'scplioiilmnts s[»., T^yuickker, Cat. Foss. Rept. Brit. Mus., ISSD, I't. 3, p. 224. 

 Sussex, England. JNliddle Eocene. 



PSEPHOPHORUS EOCffiNUS Andrews. 



I'.scpliniihonis rnra'nii.s Andrews, Geol. Mag., 4tb ser., S, 1001, p. 440, fig. 3; 

 Desc. Cat. Tort. A'ert. Fayfiui. Egypt. 1()()(), p. 27"). 



Type-locality, Qasr-el-Sagha beds, Egypt. Middle Eocene. 



EXPLANATION OF PLATE 31. 



Pscphophorus calvertensis. 



A. Portion of a rib, probably the tip, showing striations. 



B. Under side of a scute. 



C. C. Under side of scutes, showing the central pit. 



D. A minor lateral ridge, 9 mm. thick. 



E. Portion of the medium ridge, 200 mm. long; center, 20 nmi. thick; edge, 



12 mm. thick. 

 /'"'. Edge piece of the plastron, 13.5 mm. long; 10-14 mm. thick. 

 G. Piece of a median ridge, 15.'") mm. long; center, 21 mm. thick; edges, 8-11 mm. 



thick. Lateral view. 



