232 G. A. BOULENGER ON 



granular scales; ventral plates obtusely pointed, imbricate, smooth or feebly keeled. 

 Digits slightly depressed, with large transversely elliptic smooth lamellae inferiorly, 

 the distal joint compressed, bent at an angle and covered with narrow lamellae in- 

 feriorly. Femoral pores reduced to 3 to 5 on each side. Tail very long, cylindrical. 



Southern China and Formosa. 



Distinguished from Tachydromus by the structure of the digits, which repro- 

 duces the condition known in the Geckonid genus Gymnodactylus. In this respect it 

 is more specialized than Tachydromus, whist nearer to Lacerta in having occasionally 

 as many as 5 femoral pores. 



1. Platyplacopus kuehnei, Van Denb. 



Tachydromus kuehnei, Van Denb. Proc. Calif. Ac. (4) iii, rgog, p. 50, and t. c. 1912, p. 252; T. 

 Vogt. Sitzb. Ges. Nat. Fr. Berl., 1914, p. 99. 



Body feebly depressed. Head flat above, nearly twice as long as broad, its 

 depth equal to the distance between the centre of the eye and the tympanum, its 

 length 3! times (male) in length to vent ; snout acutely pointed, as long as the post- 

 ocular part of the head, with sharp canthus and vertical loreal region. Pileus 

 slightly more than twice as long as broad. Neck narrower than the head. Hind 

 limb reaching the axil (male) ; foot as long as the head. Tail more than twice as long 

 as head and body. 



Nostril pierced between 3 or 4 shields. Rostral not touching the nostril, rarely 

 in contact with the frontonasal; 1 upper head-shields rather rough with faint striae 

 and pits ; frontonasal a little longer than broad ; praefrontals forming an extensive 

 median suture ; frontal with a median keel, a little shorter than its distance from the 

 end of the snout, as long as the frontoparietals, if times as long as broad, a little 

 narrower behind than in front ; parietals if times as long as broad ; interparietal ij 

 times as long as broad, separated from the smaller occipital by a short suture formed 

 by the parietals. 4 supraoculars, first very small, second and third equal, fourth 

 small ; 4 superciliaries, first and second elongate, first in contact with the second 

 supraocular and followed by a series of granules.' 1 Two superposed postnasals 3 ; 

 anterior loreal much shorter than the second; 4 upper labials* anterior to the sub- 

 ocular, which is a little narrower beneath than above. Temporal scales very small, 

 granular, keeled; an enlarged anterior upper temporal, not in contact with the fourth 

 supraocular; a very narrow tympanic shield. 



4 pairs of chin-shields, the 3 anterior in contact in the middle ; 28 gular scales 

 on the median line, anterior granular, posterior increasing in size, imbricate, feebly 

 keeled, and merging gradually into the plates of the collar, which are pointed, feebly 

 keeled, and 11 in number. 



Dorsal plates truncate behind, in 6 + regular longitudinal series, with a vertebral 



> According to Vogt. 2 The series sometimes complete, according to Van Dentmrgh. 



3 This is probably an individual abnormality in the specimen examined by me, as no mention is made by Van 

 Denburgh of two postnasals. 



+ 4 series in one specimen out of 13, according to Van Denburgh. 



