LEPTODIRA. 171 
6. Leptodira yucatanensis. 
Leptodira annulata, var., Cope, Proc. Ac. N. Se. Phil. 1866, p. 127. 
Sibon annulatum, subsp. yucatanensis, Cope, Bull. U. 8. Nat. Mus. no. 32, p. 67. 
Hab. Mexico, Yucatan (Schott), Cozumel I. (Gawmer). 
Scales in twenty-one rows. Anterior frontals nearly square ; loreal square. Two 
(one, Cope) preoculars, the upper not reaching the vertical; two postoculars. Eight 
upper labials; eye over the third, fourth, and fifth. Head broad; neck constricted. 
Ventrals 180-193. 
Grey, with about twenty-five rounded brown spots edged with black, extending 
downwards on the sides, and sometimes partly confluent. A black band from the eye, 
across the angle of the mouth, to the first cross-band. A light collar, not divided by a 
band. 
7. Leptodira splendida, sp. n. (Tab. LIII. fig. B.) 
Hab. Mexico, Izucar (Mus. Brit.). 
Scales in twenty-one rows. Anterior frontals square, one-third of posterior; vertical 
scarcely as long as the snout, and shorter than the occipitals; loreal longer than high. 
‘Three preoculars, of which the upper is the largest, but does not reach the vertical ; 
two postoculars, the lower small. Eight upper labials, the fourth and fifth entering 
the orbit. Temporals 1+2-+3. Ventrals 165-166 ; subcaudals 76. 
Body above with broad subquadrangular black transverse spots, about twenty on the 
trunk; the spots do not extend downwards to the abdominal scutes, and generally some 
of them coalesce so as to form a short zigzag band; they are separated by yellow or 
brownish-yellow dorsal spots, the sides of the body being grey. The collar is of the 
same yellow colour, but longitudinally divided by a black line. A black stripe from 
the eye to the first black cross-band. Upper parts of the head mottled with brown. 
Lower parts uniform yellowish. 
Two specimens, of which the larger measures 26 inches, the tail measuring 64. 
8. Leptodira personata. (Tab. LIV. figg. A and B, ad. and young.) 
Leptodeira annulata, part., Gunth. Cat. Col. Sn. p. 166. 
Leptodira personata, Cope, Proc. Ac. N. Sc. Phil. (1868) 1869, p. 310. 
Hab. Mexico, Presidio (forrer), Mazatlan (Bischoff), Santo Domingo de Guzman and 
Hacienda Santa Gertrudis (A. C. Buller), City of Mexico (Geddes), Jalapa (Hoge). 
Scales in twenty-three rows. Anterior frontals as long as wide, narrowed in front, 
about one-half of posterior. Vertical as long as, or shorter than, the snout, and 
shorter than the occipitals; loreal as long as high. Preoculars (one) two, of which 
the lower is very small, the upper reaches nearly the vertical; two postoculars. Eight 
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