137. LANGAHA. 37 



sometimes dotted with blackish ; a fine yellowish-white line, edged 

 above with brown or black, extends on each side from below the 

 nasal shield to the anterior third of the body, where it is gradually 

 lost. 



Total length 950 millim. ; tail 410. 



Madagascar. 



M. Hgr. (V. 150; 0. 141). Madagascar. Paris Museum [E.]. 



b. c? (V. 152 ; 0. 148). Madagascar. 



c-d. cJ (V. 149; C. ? ) &yg. Imerina. Rev. E. Baron [0.]. 



(V. 148 ; 0. 137). 



£. cJ (V. 150; 0. ?). Antongil ;Bay. L. PI. Ransome, Esq. 



/. S {V. 147 ; C. 142). Nossi B6. 



^. Skull of/. 



[P.]. 



2. Langaha intermedia. 



Langaha intermedia, Bouleng. Ann. 8r Mag.\N. H. (6) i. 1888, p. 105, 

 pi. V. fig. 6. 



Intermediate between L. nasuta and L. crista-galli. Rostral 

 appendage once and a half to once and two thirds as long as the 

 snout, tapering to a sharp point, feebly serrated at the end, its 

 basal depth contained four to five times in its length. Ventrals 

 142-147 ; subcaudals 120-1.^5. Grey-brown above and beneath, 

 speckled with dark brown or black and with more or less distinct 

 traces of lighter; dark-edged cross-bars on the sides; no light 

 lateral streak. 



Total length 910 millim. ; tail 315. 



Madagascar. 



a. 5 (V. 142 ; C. 125). Nossi B^. (Type.) 



b, e. $ (V. 146, 147 ; C. 135, Madagascar. 

 129). 



d. Yg. (V. 147 ; C. 120). Madagascar. Mr. Last [C.J. 



3. Langaha crista-galli. 



Langaha crista-galli, Bum. S^ Bibr. vii. p. 806, pi. Ixxi. (1854) ; 

 Gilnth. Cat. p. 162 (1858) ; Jan, Icon. Gin. 33, pi. vi. fig. 1 (1869) ; 

 Boettg. Abh. Sench. Ges. xi. 1879, p. 465. 



Differs from the two preceding in having the rostral appendage 

 much deeper, obtuse or rounded, and strongly serrated at the end ; 

 its length once and one third to once and a half that of the snout, 

 its greatest depth two to three times in its length ; the serrations 

 forming one crest above and two below the distal half of the 

 appendage. Ventrals 146-149 ; subcaudals 119-142. Grey- 

 brown or reddish above and beneath, more or less speckled with 

 dark brown, and with a lateral series of more or less distinct 

 whitish, dark-edged spots alternating with those on the other 

 flide ; no light lateral streak. 



