(Plate VIII. fig. F.)
This species, the most northern of the Tachydromi, is more closely allied to the Japanese species than to any other; yet it is so different from the latter in several respects, that it could not be referred to Gray's genus Trachysaurus, established for T. japonicus. In form it is much less slender than T. meridiotielis and T. sexlineatus; in the arrangement of the head-shields it differs but little from T. meridionelis: there is a small detached shield between anteorbital and eye, and there are seven upper and six lower labials. The two vertebral series of scales are much smaller than the lateral ones. The ventral shields are as strongly keeled as those on the back, and arranged in twenty-eight transverse and in eight longitudinal series; there are, however, two other rudimentary series of small, keeled scales on each side of the belly. The fore limbs extend to the end of the snout, the hind limbs nearly to the axil. The claws are feeble, and each has at its base a small, dilated disk belonging to the skin of the toe.

Back brownish- or greenish-olive; a brown band, darkest on its edges, runs from the nostril through the eye to the tympanum, and is soon lost. There is a green, iridescent, black-edged band on each side of the back in old specimens. Lateral parts greenish, the lower yellowish.
Two specimens have been procured at Ningpo.

Length ofthe head 2A3rds of an inch, oftrunk 2 inches, oftail (reproduced) 7 inches. We have given a figure of the whole animal; and outlines of the lower jaw, of the anal region, and of a portion of the back, to show the six dorsal series of scales.