1809.] ATfD BATKACHIAXS FKOM TOKIEN. 161 



From snout to rent 270 millim. ; tail (reproduced) 240. 



Four specimens. 



I have been requested by Mr. La Touclie to dedicate this species 

 as a compliment to his chief, Sir Robert Hart, Inspector of Chinese 

 Customs. 



Kg. 1. 



Lower jaw of Ophisaurus Jiarti, much enlarged* 



In its dentition this species may be regarded as intermediate 

 between Anguis fragilis and Ophisaurus gracilis. It diflfers from 

 the latter in the presence of two scales between the rostral and 

 the anterior prsefrontal, instead of three, the still smaller ear- 

 opening, and the greater number of longitudinal series of dorsal 

 scales. The coloration is highly suggestive of affinity to our 

 European Slow-worm, the teeth of which have been shown by 

 Ley dig to be slightly furrow^ed. There is absolute identity, in 

 shape and number, between the head-shields of this species and 

 those of Anguis fragilis. 



4. Taohydeomfs sbptenxeiokalis Gthr. 



16 specimens. 



I now agree with Dr. Giinther as to the advisability of separating 

 T. septentrionalis from T. tacJiydromoides, Schleg. (cf. Giinther, 

 Ann. & Mag. N. H. [6] i. 1888, p. 166). 



All the specimens have a single inguinal pore, the number of 

 these pores being variable in T. sexlineatus, 4 specimens out of 7 

 from Great Natuna Id. having a single pore instead of tw^o {cf. 

 Giinther, Nov. Zool. ii. 1895, p. 499). The number of chin-shields 

 is three, although there are occasional exceptions, not due to fusion 

 or accidental division, as shown by the figure (p. 162) taken from 

 one of the Kuatun specimens. The dorsal scales sometimes form 

 5 series instead of 6, and in one specimen they are even in 4 series 

 on the posterior part of the back. Two of the specimens have 

 the additional series of small scales between the outer pair of 



Pboc. Zool. Soc— 1899, No. XI. 11 



