4 CHELONIA. 
2. Emys cataspila, sp. n. (Tab. VI. fig. B, young.) 
Emys ornata (part.), Gray, Cat. Tort. B. M. 1844, p. 22; Gray, Cat. Shield Rept. 1855, p. 24, 
t. 12 (not good). 
Callichelys ornata (part.), Gray, Ann. & Mag. Nat. Hist. 1863, xii. p. 176; Suppl. Cat. Shield 
Rept. p. 48 (1870). 
Hab. Mexico (coll. Brit. Mus.). 
Although our series of specimens of this form is pretty complete, it is far from 
being satisfactory, inasmuch as they are derived from different sources, with no 
more precise information as to locality than the term “‘ Mexico” in about half of their 
number. 
The young (2 inches long) shows very much the same pattern and style of coloration 
of the head, back, and sternum as Emys ornata; but the principal ocellus, with its 
yellow border, is small, occupying only a small part in the postero-inferior portion of 
each of the costal scutes. This position and size of the ocellus is not greatly changed 
in three other specimens from 5 to 7 inches in length; in larger specimens the ocellus 
is advanced more towards the dorsal line, but never occupies the upper half of the 
costal scutes as in Emys ornata. The ocellus consists now of a brownish oval spot 
with a deep black pupil and a broad yellowish border (see figure given by Gray). 
The largest of our specimens has a shell 13 inches in length. 
3. Emys salvini, sp. n. (Tabb. II. & III.) 
Callichelys venusta (part.), Gray, Suppl. Cat. Shield Rept. p. 49. 
Hab. Guatemaa (Salvin). 
This species is closely allied to Emys ornata and E. cataspila, but differs in the 
shape of the costal ocellus and of the figure on the sternum. ‘The shape and coloration 
of the head seem to be the same as in those two species. 
The principal yellow ring on the costal scutes is of a suboval shape, and occupies 
nearly the whole of the depth of the scute. There are several similar, but less distinct 
concentric rings within and without the principal ring. The ornamentation on the 
sternum is very symmetrical, ending behind in a pointed angle, and not in a straight 
and transverse line as in the other two species. 
Of this species I have seen only one specimen, the shell of which is 9 inches long. 
It was obtained by Mr. Salvin in Guatemala, and was referred by Gray to his Emys 
venusta. 
The specimen is figured on Tabb. II. and ILI. of the natural size; and separate 
figures are given of the vertebral and second costal scutes, which in the main figure 
are very much foreshortened. 
