III. 
HERPETOLOGY. 
By Albert Gunther, M.A., Ph.D., M.D., F.R.S. 
(Plates C, D.) 
DESCRIPTIONS OF TWO NEW SPECIES OF SNAKES 
FROM SO UTH-EA S TERN A FRICA. 
Family CoLUBRiD^. 
CORONELLA TRIT^NIA, sp. n. (Plate C.) 
Vertical shield elongate, twice as long as broad, longer than the 
two frontals together, or than the occipital which is rounded behind. 
Rostral shield extending on the upper surface of the head ; loreal 
square ; anteocular large, extending to the upper surface of the head, 
but not reaching the vertical ; two post-oculars. Eight upper labials, 
the fourth and fifth entering the orbit, the last small. Two large 
anterior temporals which are in contact with both post-oculars ; the 
outer temporals scale-like. Scales in seventeen rows, with a single 
apical groove. Ventrals i68 ; anal bifid ; sub-caudals 6i. Posterior 
maxillary tooth grooved. Ground colour light olive, with three well de- 
fined brown longitudinal bands ; the median one commences behind 
the occipital and is lost in the middle of the tail ; it occupies the 
median series of scales, and has a fine yellow line running along its 
middle ; the lateral band commences underneath the canthus rostralis, 
and is continued to the end of the tail ; it occupies the third and fourth 
outer series of scales and the adjoining halves of the neighbouring 
series ; it has narrow black edges ; the outermost series of scales is 
white like the abdomen, but with a faint brownish line. Lower parts 
pure white. 
Total length 19 inches ; the cleft of the mouth measuring six lines, 
and the tail 3^ inches. 
