EMYDID&. 35! 
The wniter has received for examination from the Wagner Free Institute an injured nuchal 
bone (plate 54, fig. 3) that was collected at Peace Creek, Florida. It has some resemblance to 
that of 7. euglypha. The sculpture is not so strong and that produced by the growth of the 
horny scutes shows in addition to that seen in the type of the species. On the area of the first 
vertebral scute, in the midline, there is a high ridge, or carina. 
Trachemys sculpta sp. nov. 
Plate 54, figs. 4-9. 
In the Dr. Jarman collection of fossil bones made in Hillsboro County, Florida, now the 
property of Vanderbilt University, there 1s a strongly sculptured nuchal bone which represents 
probably a hitherto undescribed species. This nuchal resembles much that of 7. brsornata 
(Cope) and possibly belongs to it; but the differences in form and sculpture and apparently 
the differences of level seem to justify regarding it as distinct. Cope’s bisornata came from the 
Equus beds, belonging to the Pleistocene; the present species from probably the Peace Creek 
beds, belonging to ae Pliocene. 
The nuchal (plate 54, fig. 4) has a median length of 55 mm.; a width of 29 mm. in front; 
and a maximum width of 63 mm. The length and breadth are relatively the same as in T. 
bisornata. The width in front is only 50 per cent. of the length, while in 7. brsornata it is 
7o percent. The anterior edge is obtuse; in the Texas species it is acute. The greatest 
thickness, just behind the sulcus between the nuchal and vertebral scutes, is 15 mm.; oat at 
the articulation with the first peripheral, 13 mm. Where the bone joins the first neural the 
thickness is 7mm. The area of the first vertebral scute 1s very convex, producing a broad 
rounded carina. 
The sulci are sunken to a great depth. The nuchal scute is long and narrow, and its area 
is raised into a strong ridge. The first vertebral 1s 24 mm. wide in front and it expands poste- 
riorly. The front of each first marginal on this bone is nearly one-half the width of the front of 
the first vertebral. In T. biscknata it is not one-third. The areas of the first marginals are 
sculptured into prominent ridges and grooves. In T. bisornata these are feeble ant the lines 
of growth of the scutes are more prominent. Where the ridges show in bisornata they diverge 
at a greater angle from the midline. On the area occupied by the first vertebral of 7. sculpta 
there are some ridges running parallel with the midline. On the area occupied by each first 
marginal there are § or 6 ridges which run outward and backward. 
Plate 54, fig. 5, represents the distal end of probably the third costal. Its width is 45 mm. 
at the distal border, but it narrows upward. The fragment belongs to the Jarman collection, 
in Vanderbilt University. 
Plate 54, hgs. 6, 7, represents two neural bones found with others of the same kind in the 
Jarman collection. The one with the sulcus crossing it has a length of 35 mm. and a thickness 
where it joined the costal of 15 mm. They may or may not belong to the species here described. 
Figs. 8 and g of plate 54 represent two costals which may belong to the present species. 
Fig. 8 is probably the right fourth costal and lacks the proximal half. The thickness at the 
distal endis8 mm. The original of fig. g is the left sixth costal. It is thickened on the anterior 
border of the distal end to 13 mm., the posterior border at the distal end being only g mm. 
The type nuchal resembles rather closely T. ewglypha (Leidy); but the front of the nuchal 
of the latter is broader and more deeply notcht and the excavation for the first neural is broader. 
The nuchal scute is broader and shorter. The greatest thickness is 21 mm., far exceeding that 
of T. scul pta. 
Trachemys? jarmani sp. nov. 
Plate 54, figs. 10-12. 
The species to which the above name is given is based on a complete nuchal bone, a part 
of the Jarman collection of fossil bones obtained in Hillsboro County, Florida, by Dr. W. H. 
Jarman, and presented by him to Vanderbilt University, Nashville, Tennessee. The age of 
the beds is somewhat uncertain, but they are probably of the same age as the Peace Creek 
beds. ‘The species is referred provisionally to Trachemys 
The nuchal (plate 54, fig. 10) is remarkable on account of the shortness of its hinder 
portion and the evidence w hich it affords that the neural bones were very broad. The total 
