CoH Et, ON EA. 
CH AS Pest is, 
TESTUDO, Linnacvs. 
Aut the fossil turtles from Nebraska, which have come under my inspection, 
belong to the genus Zéestudo. 
In the ordinary constitution of Zestudo, the osseous carapace is composed of ten 
vertebral plates, eight pairs of costal plates, and eleven marginal plates upon each 
side of a symmetrical nuchal and pygal plate. 
Fig. 1. Ideal view of the structure of 
the carapace of Testudo. The dark out- 
lines indicate the boundaries of the scutes; 
the serrated lines, the limits of the plates. 
lvp—LOvp (median line), vertebral plates; 
lep—8ep (right hand), costal plates; Imp 
. —IL1mp, marginal plates; np, nuchal plate; 
pp, pygal plate; lvs—5ys, vertebral scutes; 
Ics—5 (left), costal scutes; Ims —11ms, 
marginal scutes; ns,-nuchal scute; ps, py- 
gal scute. 
The first vertebral plate is oblong quadrilateral; the succeeding plates, to the 
eighth inclusive, are most usually hexahedral; the penultimate plate is inverted V 
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