36 



C0LTJBEIDJ3. 



with apical pits, in 19 rows ; ventrals rounded or obtusely angu- 

 late laterally. Tail long ; subcaudals in two rows. Hypapophyse* 

 developed throughout the vertebral column. 



Madagascar. 



Maxillary and mandible of Langaha nasuta. 



Synopsis of the Species. 



Eostral appendage twice as long as the 



snout, ensiform, not serrated 1. nasuta, p. 36. 



Rostral appendage once and a half to once 



and two thirds as long as the snout, 



tapering to a sharp point, and serrated 



above at the end 2. intermedia, p. 37^ 



Eostral appendage not more than once and 



a half as long as the snout, serrated 



above and beneath 3. crista-galli, p. 37, 



1. Langaha nasuta. 



Brugniire, Journ. de PJiys. xxiv. 1784, p. 132, pi. ii. 



Langaha nasuta, Shaw, Nat. Misc. xxii. pi. cmlxviii. — (?) ; Giinth.^ 



Cat. p. 162 (1858) ; Boettg. Abh. Sench. Ges. xi. 1878, p. 270, ani 



1879, p. 467, and xii. 1881, p. 447. 

 AmphisbEena langaha, Schneid. Hist. Amph. ii. p. 857 (1801). 

 Langaha madagascariensis, Daud. Rept. vii. p. 240 (1803). 

 DryiopMs langaha, ScMeg. Phys. Serp. ii. p. 248 (1837), and Abbild. 



p. 20, pi. vii., & pi. viii. figs. 7-11 (1837). 

 Langaha ensifera, Bum. ^ Bibr. vii. p. 803 (1854) ; Jan, Icon. G^^ 



33,pl. vi. fig.2(1869). 



Head narrow and elongate, ending in a long, ensiform, three- 

 edged rostral appendage, covered with imbricate scales, which gradu- 

 ally tapers to a sharp point ; the length of this appendage about 

 twice the length of the snout, and five to six times its basal depth ; 

 rostral nearly twice as broad as deep ; a pair of more or less 

 regular, enlarged praefrontal shields ; frontal narrow, its anterior 

 width about equal to the posterior width of the supraocular ; one,, 

 two, or three loreal shields ; two pree- and four postoculars ; tem- 

 porals small, scale-like ; eight upper labials, fourth and fifth 

 entering the eye ; three pairs of chin-shields bordering the mental 

 groove. Scales rather strongly keeled, in 19 rows, yentrals 145- 

 152 ; anal divided (rarely entire) ; subcaudals 136-153. Pale 

 brown to briok-red above, uniform, or with Hi-defined small black 

 spots J upper lip and lower parts yellow or orange, the beUy and tail 



