60 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 66 



keeled scales gradually enlarging toward dorsals and ventrals about 

 14 in a transverse row; scales on upper surface of hmbs, like dorsals, 

 the largest scarcely smaller; gulars gi-anular, considerably elongated 

 anteriorly between the chin shields and merging gradually posteri- 

 orly into the pointed and keeled scales covering lower neck and . 

 collar about 29 granules and scales on the median line between 

 chin shields and collar; a distinct gular fold; 6 rows of ventral 

 plates, all smooth except outer row which is slightly narrower, keeled 

 and pointed, abruptly set off from the adjoining small-keeled scales 

 of the flanks, 25 on the median line from collar to preanal plate; 

 preanal plate large, smooth, with two narrow scales on each side; 

 two inguinal pores on each side; subdigital lamellae under fourth toe 

 27; tail three times as long as head and body together with strongly 

 keeled and pointed scales which are about as long as the large 



/~1 *-\ 1» C Q I C 



Color (in alcohol) : Dark olive gray, outer dorsal row faintly 

 paler; a narrow pale line from posterior supralabials on side of neck 

 below tympanum to shoulder; entire underside bluish gray except 

 underside of arms and legs (but not hands and feet) whitish. 



DIMENSIONS mm. 



210 



Total length 



Snout to vent 



Vent to tip of tail ^^ 



Snout to collar 



Snout to posterior edge of occipital 



Snout to ear-opening " 



Snout to posterior edge of ear-opening ("length of head' ) i^ 



Greatest width of head 



Fore leg 27 



Hind leg 



Variation.— The variations of the five specimens in proportions 

 and structural details may be seen from the appended tables. It 

 may be added that all have the nas'als in contact behind the rostral. 

 The internasal, or fronto-nasal, is not always as long as in the type; 

 the first (small) supraocular, may be almost 'as large as the fourth, 

 or may be reduced to a mere pin point; second pair of chin shields 

 may be in contact throughout their length; otherwise there is a very 

 great uniformity in the series. 



Bemarks.— The Szechwan species here described seems to be so 

 intermediate between the various forms of this genus as to well 

 merit the name I have given it. An 'attempt to identify the five 

 specimens before me by the " Synopsis " in Boulenger's excellent 

 :Monograph of the Lacertidae,^" at once demonstrates the central po- 



«Vol. 2, 1921, p. 128. 



