TESTUDINATA. 
59 
thus indicating a male. The figure referred to gives a view of the 
upper surface of the hinder lobe. This lobe has a length of 136 
mm. along the median line; the length, taken across the lateral 
hinges, is 133 mm. At the midline in front the thickness is 9 mm.; 
but backward this increases to 15 mm. The lateral hinge lines are 
46 mm. long. The horn-covered surfaces, behind the lateral hinges, 
are 24 mm. wide and the thickness of the bone at the inner border 
of the surface, is 15 mm. 
Seen from below, the hypoplastron has a length of 53 mm., the 
xiphiplastron, a length of 80 mm. The sulci separating the vari¬ 
ous scutes run a rather irregular course, especially the median 
sulcus. Measured on the midline the abdominal scutes are 40 mm. 
long; the femorals, 24 mm.; the anals, 71 mm. 
A part of another hinder lobe of a male, No«. 5902, was 140 
mm. wide; but only 8 mm. thick at the midline in front. The ab¬ 
dominals are 50 mm. long; the femorals, 21 mm. In a damaged 
hinder lobe of a female, No. 5461, the width is 120 mm.; the thick¬ 
ness in front, 10 mm. The abdominals are 45 mm. long; the 
femorals 13 mm.; the horn-covered surface above is 18 mm. wide. 
Figure 2 of plate 5 represents of two-thirds the natural size 
a portion of an anterior lobe which evidently belonged to this 
species. Its size agrees with that of the type hinder lobe. The 
width at the hinge line is 130 mm. The length at the midline was 
not far from 90 mm. The epiplastral lip is mostly gone; but its 
width was close to 55 mm. The horn-covered upper surface is 18 
mm. wide. The hinder two-thirds of the free border is acute. The 
boundaries of the entoplastron are made out with difficulty. The 
bone was circular, with a diameter of 44 mm. The courses of 
the sulci are much as in a specimen of T. trivmguis at hand. 
On plate 4, figure 4, is represented the lower surface of a 
hinder lobe which is referred to this spceies. It was found near 
the coast, about 28 miles south of St. Augustine, by Mr. Fred R. 
Allen, 113 King street, St. Augustine. The length along the mid¬ 
line is 122 mm.; the width, 116 mm. The abdominal scutes are 
46 mm. long; the femoral only 13 mm. Nevertheless, there ap¬ 
pear to be no good reasons for not referring this specimen to the 
species here described. 
A fragment, No. 4435, from 20 miles north of St. Augustine 
(pi. 4, fig. 5), shows a part of the right side of the carapace. 
There are seen a part of the area covered by the first costal scute. 
