110 _ OPHIDIA. 
III. The black rings well separated by the yellow rings, but encroaching so much upon the red as 
to be partly confluent, the red colour appearing on each side as a rounded spot.— 
Tehuantepec. (Fig. C.) 
IV. The rings nearly obsolete, the presence of black rings being indicated on the tail and hind 
part of the trunk only.—Yucatan. (Fig. A.) 
2. Coronella mexicana. 
Ophibolus triangulus, var. mexicanus, Garman, Rept. & Batr. N. Amer. p. 66. 
Hab. Mexico, near San Luis Potosi. 
8, Coronella leonis, sp.n. (Tab. XXXIX. fig. A.) 
Hab. Mexico, Nuevo Leon (W. Taylor). 
Scales in twenty-three rows, without pit, smooth; head similar to that of Coronella 
levis; anterior frontals not quite half the size of posterior; vertical five-sided, with the 
lateral margins convergent; one preocular not reaching the vertical; two postoculars ; 
loreal longer than deep; seven upper labials, the third and fourth entering the orbit; 
temporals 2-++3, of the two anterior only the upper one is in contact with the post- 
oculars. Ventrals 200; anal entire; subcaudals 50. Body pale olive-colour on the 
back, with twenty-seven salmon-coloured incompletely black-edged spots, some being of 
a transversely oval shape, but the majority presenting the appearance of being formed 
of two rounded portions. On the tail the spots lose their light centre and appear 
merely as brown spots. The lateral spots which are so conspicuous in most variations 
of Coronella triangulum are here nearly entirely absent. Vertical and each occipital 
with a black spot, red in the centre; abdomen with only a few blackish blotches 
irregularly scattered. A black band along the middle of the lower part of the tail. 
The single specimen measures 234 inches, the tail 33 inches. 
This snake may be considered to be one of the aberrant forms of Coronella trianqulum. 
4. Coronella godmani. (Tab. XXXIX. fig. B.) 
Dromicus godmanni, Ginth. Ann. & Mag. N. Hist. 1865, xv. p. 94. 
Rhadinea godmani, Cope, Journ. Ac. N. Sc. Phil. viii. p. 189. 
Henicognathus godmanii, Bocourt, Miss. Sc. Mex., Rept. p. 631, t. 40. figg. 5, 5 a—d. 
Hab. GuatemaLa, Duefias (G. & S.). 
Scales smooth, without apical groove; in twenty-one series; ventrals 176 ; anal divided ; 
subcaudals 88. Loreal longer than or as long as high ; one pre-, two postoculars. Upper 
labials eight, the fourth and fifth entering the orbit. Temporals 1+2+3. Tail two- 
sevenths of the total length. Posterior chin-shields shorter than the anterior, which 
are in contact with four lower labials. Brownish grey, with a blackish vertebral band 
as broad asa scale; another similar band runs along the fifth outer series of scales. 
