22 COLTTBEIDiE. 



Fordonia leucobalia, Qray, Zool. Misc. p. 67 (1842), and Cat. p. 77 



(1849) ; Bouleng. Faun. Ind., Rept. p. 878 (1890) ; W. L. Sclater, 



Journ. As. Soc. Beng. Ix. 1891, p. 245. 

 unicolor, Cfray, Cat. p. 77 ; Qiinth. Rept. Brit. Ind. p. 277 



(1864), and Zool. Bee. 1865, p. 154; Theob. Cat. Mept. Brit. Ind. 



p. 182 (1876) ; Peters 8f Doria, Ann. Mm. Geneva, xiii. 1878, 



p. 389. 

 Hemiodontus leucobalia, Bum. ^ Bibr. vii. p. 884 (1854) ; Jan, Arch. 



Zool. Anat. Phys. iii. 1865, p. 264, and Icon. Gen. 28, pi. vi. fig. 1 



(1868). 



chalybseus, Jan, Elenco, p. 79 (1863), and II. ce. pi. vi. fig. 3. 



Fordonia bicolor, Theob. Journ. Linn. Soc. x. 1868, p. 56, and Cat. 



Bept. Brit. Ind. p. 181. 

 variabilis, Macleay, P)-oo. Linn. Soc. N. S. W. ii. 1878, p. 219. 



Rostral nearly as deep as broad ; frontal a little longer than 

 broad, longer than its distance from the end of the snout, a little 

 shorter than the parietals ; one prae- and two postoculars ; temporals 

 1+3 or 2+3; five upper labials, third entering the eye; three 

 lower labials in contact with the anterior chin-shields, which are 

 small and a little larger than the posterior. Scales in 25 to 29 

 rows. Yentrals 130-156, last frequently divided ; anal divided ; 

 subcaudals 26-43. Coloration of upper parts very variable ; lower 

 parts uniform yellowish white. 



Total length 930 millim. ; tail 110. 



Rivers and Coasts of Bengal, Burma, Cochinchina, Malay Archi- 

 pelago, ITew Guinea, and North Australia. 



A. Black above, with or without small yellowish-white spots. 



{F. leucoialia, Schl.) 



a. $ (Sc. 25 ; V. 155 ; Nicobars. W. T. Blanford.Esq. 



C. 29). [P.]. 



b-c. c? (Sc. 25 ; V. 148 ; N. Coast of Australia. H.M.S. ' Alert.' 



C. 37) & ? (Sc. 25 ; 



V. 147 ; C. 28). 



d. (5 (Sc. 25; V. 148; N.Australia. Mrs. Montague Levev 



C.38). [P.]. 



B. Yellow or pale reddish above, spotted or marbled with black. 



a-e. S (Sc. 25 ; V. 145, Port Darwin, N. Aus- R. G. S. Buckland 

 146 ; 0. 33, 89) & ? tralia. Esq. fP 1. ' 



(Sc.25; V.149;0.32). 



C. Red above, with a black vertebral stripe ; head black. 



a. S (Sc. 25 ; V. 143 ; N. Coast of Australia. H.M.S. ' Alert ' 

 C. 39). 



D. Brown above, with or without small black spots, gradually 



passing to yellowish on the sides. {F. unicolor. Gray.) 



a. $ (Sc. 29 ; V. 155 ; Burma. H. L. Goertz, Esq. 

 C. 30). [P.]. ' ^ 



b. 2 (Sc. 27 ; V. 152 ; Cochinchina. C. E. Cox-Smith 

 C. 32). Esq. [P.]. ' 



