1881.] AND FROGS FROM SINGAPORE. 219 



Rostral well developed ; prajfrontals more than half as large as 

 postfrontals, the suture between the former but little shorter than 

 that between the latter. Vertical large, pentagonal, the anterior 

 margin convex, lateral edges converging slightly behind, posterior 

 margins meeting at a riglit angle. Each occipital is both longer and 

 broader than the vertical, and is rounded behind. 



Loreal well developed, about as high as broad. Two (or three) 

 prseoculars, the upper double tlie size of the lower ; two postoculars ; 

 temporals 2 + 3, the upper anterior temporal shield in contact with 

 both postoculars ; two elongate temporals along the outer side of 

 each occipital. Upper labials 8, the seventh excluded from the 

 margin of the lip, the fourth and fifth (or on one side the fiftli only) 

 entering the orbit. Two pairs of chin-shields, the posterior but 

 little shorter than the anterior. 



Ventral shields 17.5; anal undivided; subcaudals in .50 pairs, 

 with a long terminal scale. 



Back grey, with eleven dark-brown cross bands or large trans- 

 verse spots on the body, and four on the tail, all having very 

 irregular zigzag margins, and being, where widest, about half the 

 breadth of the interspaces ; the latter are slightly spotted and 

 mottled with brown. On the head there is a broad dark cross band 

 between the anterior parts of the eye-orbits on the front part of the 

 vertical and on both pairs of frontals, and continued below the eye on 

 the fifth and sixth supralabials. Behind this is a pointed elongated 

 arrowhead-shaped dark mark, joining the anterior band on the 

 vertical shield, and bifurcating behind on the neck ; there is also an 

 oblique band just behind the angle of the mouth. Belly whitish, 

 with small quadrangular dark spots on the sides of every second or 

 third ventral. 



A single specimen is sent ; it is only 8 inches long, the tail mea- 

 suring 1;^. 



This is another species of the peculiar group of Simotes com- 

 prising S. cochinchinensis, S. brevicauda \ S. catenifer, and S. an- 

 coralis ^. It is distinguished from all by having the seventh supra- 

 labial shield shut out of the lip-margin, and from all but the first 

 by having twenty-one rows of scales. The coloration, too, differs 

 somewhat from that of S. cochinchinensis, in which the lower parts 

 are white. 



Nymphophidium subannulatum. 



Odontomus suhannulaius, Dum. et Bibr. Erp. Gen. vii. p. 454 ; 

 Jan & Sordelli, Icon. Oph. 36'' livr. pi. v. fig. 3. 



1 had already identified the single specimen in the collection with 

 the snake described by Dumeril and Bibron, and figured by Jan^ 



' Steindaclmer, Novara Eept. p. 61, pi. iii. figs. 13-14. 



2 Jan, Icon. Gen. Opb. 11^ livr. pi. (3. fig. 2: see Stoliczka, J. A. S. B. 1873, 

 xlii. p. 122. 



" The specimen described by the first-named writers, the only one they had 

 seen, was from the Leyden Museum ; and as Jan's figure was taken from a 

 snake belonging to the same collection, it is probable that the same individual 

 was examined by both authors. The dimensions agree. 



