TACHYDROMUS SEXLINEATUS. 69 



TACHYDROMUS, Baudin. 



Head elongato-pyramidal, body subcylindrlcal, tail very long. Nostril in 

 a single nasal shield immediately above the labials. Dorsal scales large, 

 strongly keeled, the keels being confluent Into longitudinal ridges ; all the 

 ventral shields, or at least the lateral ones, keeled. Sides covered with 

 granular scales. Anal shield surrounded by smaller ones ; one or two in- 

 guinal pores on each side. Femoral pores none. Tail with rings of keeled, 

 quadrilateral shields. An indistinct collar. Toes not serrated or keeled. 

 Tympanum distinct. 



Synopsis of the Species. 



* All the ventral shields are keeled ; three pairs of chin-shields. 



1. Dorsal scales in four, ventral shields in tenf longitudinal series; ventral shields in twenty-two 



or twenty-three transverse rows. Generally two inguinal pores on each side of the vent : 

 Tachydromus sexlineatus , Daud., from Rangoon, Borneo, and probably from other islands of 

 the East Indian Archipelago. 



2. Dorsal scales in four, ventral shields in twelve longitudinal series ; one inguinal pore on each side 



of the vent : Tachydromus meridionals, n. sp., from Southern China. 



3. Dorsal scales in six series : Tachydromus septentrionalis , n. sp., from Ningpo. 

 ** Only the lateral ventral shields are keeled ; four pairs of chin-shields. 



4. Dorsal scales in six, ventral shields in eight series ; inguinal pores two on each side : Tachydromus 



japonicus, Dum. & Bibr., from Japan, 



Tachydromus sexlineatus. (Plate VIII. fig. C.) 



Tachydromus sexlineatus. Baud. Rept. iii. p. 256. tab. 39. Dum. ^ Bibr. Erpet. gen. v. p. 158. 



quadriUneatus, Baud. I. c. p. 252. 



typicus, Gray, in Ann. i^~ Mag. Nat. Hist. i. p. 389. 



Three pairs of chin-shields. Dorsal scales strongly keeled, in four longitudinal series ; all 

 the ventral shields are keeled, and form ten longitudinal and twenty-two or twenty-three 

 transverse series. Generally two inguinal pores on each side of the vent. Greenish bronze- 

 coloured above, sometimes with a pair of silvery bands ; sides greenish, separated from the 

 brown of the back by a narrow black streak, commencing at the nostril and passing through 

 the eye and tympanum. The lower parts yellowish, iridescent. 



We have specimens of this species from Rangoon and from Borneo ; it probably occurs 

 also in other parts of the East Indian Archipelago. The largest specimen is 14 inches long, 



t " Six series longitudinales " (Dum. & Bibr. v. p. 160) is probably a misprint. 



