364 coLTJBEiD-a:. 



than the parietals ; loreal elongate, entering the eye ; no praeocular ; 

 two postoculars ; temporals 2 + 3 ; eight upper labials, third, fourth, 

 and fifth entering the eye ; five lower labials in contact with the 

 anterior chin-shields, which are as long as the posterior, or a little 

 longer. Scales with a very faint keel along their anterior half, 

 in 17 rows. Ycntrals 200-208 ; anal divided ; subcaudals 08-74. 

 Pale greyish brown above, with black cross bands, the oufer portion 

 of which is narrowly detached on the side ; upper surface of head 

 blackish ; lower parts yellowish, dotted with black, and with a 

 lateral series of black s])ots alternating with the dorsal bands. 



Total length GOO millim. ; tail 120. 



Japan. 



a-b. $ (V. 202, 205 ; Nikko, Central C. Maries, Esq. [C.]. 



C. 68, 70). Japan. (Types.) 



5. Dinodon? tessellatus. 

 Proterodon tessellatus, Halloiv. Proc. Ac. Philad. 1860, p. 499. 



Loreal quite small ; a praeocular ; two postoculars ; temporals 

 2 + 2 ; eight upper labials, fourth and fifth entering the eye. Scales 

 with a slight keel extending halfway along the middle, in 21 rows. 

 Yentrals 211; anal divided; subcaudals 73. Olive above; belly 

 orange, tessellated with black. 



Total length 900 millim. 



Japan. 



50. STEGONOTUS. 



Lvcodon, part., SchJeg. Phys. Serp. ii. p. 104 (1837) ; Dum. ^- Bibr. 



'Erp. Gen. vii. p. 367 (1854) ; Jan, Elenco sist. Ofid. p. 97 (1863). 



Stegonotus, Dum. 8f Bibr. Mem. Ac. Sc. xxiii. 1853, p. 477, and Erp. 



Gen. vii. p. 680. 

 Heipetodrvas, part., Jan, I. c. p. 80. 



Lielaphis,6'«w//i. Proc. Zool. Soc. 1863, p. 69, and 1877, p. 129. 

 Zamenophis, Gimih. Ajin. 8f Mag. N. H. (4) ix. 1872, p. 21. 

 Pseudolycodon, Peters, 3Ion. Berl. Ac. 1876, p. 534. 

 ? Herbert ophis, Macleay, Proc. I Ann. Soc. N. S. W. viii. 1884, 

 p. 434. 



Maxillary teeth 15 to 20, increasing in size towards the middle 

 of the series, then decreasing in size to the two or three last, which 



Fig. 25. 



Maxillary and mandible of Stegonotus modestiis. 



are again large ; anterior mandibular teeth enlarged. Head more 

 or less distinct from neck ; eye moderate or rather small, with 



