TESTUDINATA. 69 
cene deposits of Hillsboro county, Florida. The other bones were 
referred provisionally to the same species. 
The two bones here described (3740a being a part of the nuch¬ 
al, and 3740a the right eleventh peripheral) are recorded as com¬ 
ing from the north bank of the Calooisahatchee river just above 
Labelle. This place is in Lee county and in the township num¬ 
bered 43 south, 29 east. 
The hinder half of the nuchal (pi. 7, fig. 8) is missing. The 
part present appears to be identical with the figured type but it is 
somewhat larger, the distance along the front being 32 mm., in¬ 
stead of 29 mm. The width of the bone at the hinder edges of 
the first marginals is 50 mm. instead of 41 mm. The front border 
is somewhat more deeply notched than in the type. The greatest 
thickness is 16 mm. The region of the nuchal scute is elevated, 
as in the type. Its surface is deeply pitted. The remainder of 
the surface of the bone is marked by prominent and sharp ridges. 
The eleventh peripheral (pi. 7, fig. 9) is complete. Its great¬ 
est height is 37 mm.; the width along the free border, 34 man.; the 
thickness at the suture with the tenth peripheral 12.3 mm. The 
bone joined the tenth peripheral, the eighth costal, the suprapygal 
and the pygal. The free border is notched where crossed by the in¬ 
ter marginal furrows. On its outer surface are scutal areas belong¬ 
ing to the eleventh and twelfth marginals and the fifth vertebral. 
The positions of the sulci indicate that the fifth vertebral did not 
come down on the pygal nor the fourth costal on the tenth peripheral. 
The fifth vertebral area is marked by sharp broken ridges and 
pointed tubercles. The sharp ridges of the area of the eleventh 
marginal run parallel with the front edge of the bone; those of 
the twelfth marginal area are directed backward and downward. 
The proximal end of a right third costal, No. 352 (pi. 7, 
fig. 10), is referred to this species. On this fragment are shown 
parts of the second and third vertebral scutes and a part of the 
second costal scute. The figure referred to shows the character 
of the sculpture. The width of the bone along the sulcus between 
the costal scute and the two vertebrals is 28 man. 
From Vero, St. Lucie county, Dr. Sellards has sent to the 
writer some bones which appear to belong to this species. One, 
No. 7102, is a portion of a nuchal like that here figured (pi. 7, 
fig. 8). The nuchal scute is somewhat narrower and the sculpture 
of the bone in general is hardly so strong. There are also two 
