Plate 7. 
All the bones of this plate are slightly less than the natural size. 
Fig. 1. 
Figs. 2-7. 
2 . 
3 - 
4 - 
6 . 
/• 
Figs. 8-10. 
8 . 
9 - 
10. 
Trachemysf delicata. Type. Right fourth costal, with distal end 
missing. No. 3738. P. 66. 
Trachemys bisornata. P. 67. 
Nuchal plate, No. 3735, showing upper surface. 
Right third peripheral plate, showing outer surface. No. 3740. 
Same bone, seen from behind. Shows sutural border for the fourth 
peripheral (on upper and right-hand parts of figure) and for 
hyoplastron and its buttress (on lower part of figure). 
Same bone as that of figures 3 and 4, showing the front end, which 
joins the second peripheral. 
Sixth right peripheral, showing outer surface. No. 1755. 
Same bone, showing the hinder end, for union with seventh peri¬ 
pheral. 
Trachemys sculpta. Three bones of carapace. P. 68. 
Anterior part of nuchal bone. No. 3740a. 
Eleventh right peripheral, showing outer surface. No. 3740e. 
Proximal end of right third costal, showing outer surface. No. 352. 
