NO. 409.] THE SCULPTURED TORTOISE. 19 
first, the middle and posterior parts of the median series; and, 
secondly, the anterior parts of the marginal series. 
In the median series the nuchal and first central scutes are 
essentially normal. The second’ central is irregular on its 
posterior margin; the 
third and fourth centrals 
are apparently each 
divided in two by nearly 
parallel oblique lines; 
and the fifth central is 
irregular anteriorly. The 
second, third, and fourth 
centro-laterals of the right 
side are also irregular in 
form. To the right of 
the fifth central is a small 
supernumerary scute, 
which may represent a 
part of any one of the sur- 
rounding elements except 
the marginals. These are 
apparently not involved 
in the irregularity, whose Fte. 3. — Dorsal view of abnormal carapace No. 1. The 
: à black en give iu ‘clad of the bony plates. x %. 
center obviously lies to 
the right of the median line in the region of the third and 
fourth centrals. 
When the bony plates underlying the region of irregularity 
just described are inspected (Fig. 3) they are seen to present 
no features essentially different from the normal arrangement, 
and it is, therefore, clear that in this region the abnormali- 
ties are limited to the scutes and are not associated with any 
peculiarities of the underlying bony plates. 
The second abnormal region in this carapace lies anteriorly 
and is easily recognized by peculiarities in the marginal scutes 
(Fig. 2). If the lines of separation between the first and 
second centro-lateral scutes of both sides are traced laterally, 
they will be found to be continuous with lines between mar- 
ginal scutes. These intermarginal lines are undoubtedly a 
