TacJnjihomiis. 121' 



rarely in contact with frontoparietal ; 1 to 3 femoral pores on earli 



side. 



Dorsal plates in 4 (very rarely 6) longitudinal series ; ventral 



plates in 21 to 28 transverse series; 3 (rarely 4) pairs of 



chin-shields ; collar more or less distinct; head about twice 



as long as broad ; tail 3 to 5 times length of head and body. 



T. sexlineatus, Daud., p. 151. 

 Dorsal plates in 6 longitudinal series ; ventral plates in 30 

 transverse series ; 4 pairs of chin-shields ; no trace of a 

 collar ; head 2^ times as long as broad ; tail 24 times as long- 

 as head and body .... T. haughtonianus, Jerd., p. 1.5.5. 



1. TACHYDEOMUS AMURENSIS. 



Tachy(lroiiiit.'< amurengh, Peters, Sitzb. Ges. Naturf. Fr. Berl. 1881, 

 p. n ; Bouleui>-. Cat. Liz. iii, p. 6 (1887) ; Gliuth. Ann. & Mag. N. H. 

 (6) i, 1888, p. 169; Bouleug. Ann. & Mag. N. H. (6) v, 1890, 

 p. 137 ; Nikolsky, Herp. Eoss. p. 92 (1905) ; Stejueger, Herp. Japan, 

 p. 245, fig. (1907) ; Bouleng. Mem. As. Soc. Beug. v, 1917, p. 210, 

 pi. xlvi, fig. 1. 



Body feebly depressed. Head about 1^ times as long as broad, its 

 depth equal to the distance between the anterior corner of the eye and 

 the tympanum, its length 3| to 4 times in length to vent in males, 

 4^ to 4t times in females ; snout obtuse, with obtuse canthus, as long 

 as or slightly shorter than the postocular part of the head. Pileus I5 

 to 2 times as long as broad. Neck as broad as the head. Limbs 

 short ; the hind limb reaches the elbow or the axil in males, barely 

 the wrist in females. Foot as long as the head or slightly longer. 

 Tail 1 J to a little over 2 times the length of head and body. 



Nostril pierced between three shields. Eostral not touching the 

 nostril, broadly in contact with the frontonasal, which is broader than 

 long and as broad as the internarial space ; prefrontals forming a 

 median suture or separated by a small azygos shield* ; frontal as 

 long as its distance from the end of the snout, 1-^ to 1^ times as long 

 as broad, of nearly equal width throughout, or narrower behind than 

 in front; parietals a little longer than broad (not more than IJ), in 

 contact with the upjier postocular and with 3 or 4 temporals ; inter- 

 parietal a little longer than broad ; occipital much shorter than the 

 interparietal, its posterior border usually convex and projecting beyond 

 the parietals. Four supraoculars, first very small, sometimes divided 

 into two, or in contact with the frontal, second and third equal or 

 second the larger, fourth small Ijut larger than first, sometimes not 

 * In a m.ile from Chaln'rowka 

 vol.. 11. y 



