V2. LIOHBTBEODON. 269 



scarcely distinct from neck ; snout pointed, projecting ; rostral 

 large, subtrihedral ; eye large, with round pupil. Body cylindrical; 

 scales smooth, with apical pits, in 21 or 23 rows ; ventrals rounded 

 or obtusely aagulate laterally. Tail moderate ; subcaudals all or 

 part in two rows. Hypapophyses developed throughout the verte- 

 bral column. 

 Madagascar. 



1. Lioheterodon madagascariensis. 



Heterodon madagascariensis, Dum. ^ Bibr. vii. p. 776, pi. Ixix. 



(1854); Boettg. Ahh. Senck. Ges. xi. 1877, p. 5, and xii. 1881, 



p. 442. 

 Anomalodon madagascariensis, Jan, Arch. Zool. Anat. Phys. ii. 1863, 



p. 227, and Icon. Gin. 10, pi. vi. fig. 1 (1865). 



Portion of rostral visible from above as long as or a little shorter 

 than its distance from the frontal ; internasals as long as the prse- 

 frontals ; frontal nearly once and a half as long as broad, as long as 

 its distance from the end of the snout or a little shorter, as long as 

 the parietals ; loreal longer than deep ; one prse- and three or four 

 postoculars ; temporals small, scale-like ; eight upper labials, fourth 

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

 anterior chin-shields, which are a little longer than the posterior. 

 Scales in 23 rows. Ventrals 206-216 ; anal entire ; subcaudals 

 62-73, the anterior single. Brown or black above, with pale brown 

 or yellowish spots ; sides j-ello wish, with two alternating series of 

 black spots, the upper of which may be confluent into a zigzag 

 band ; upper labials yellowish, with black sutures ; lower parts 

 yellowish, with small black spots. 



Total length 1020 millim. ; tail 170. 



Madagascar. 



a. 2 (V. 206; C. 62). Imerina. Rev. R. Baron [0.]. 



i. $ (V. 216; C. 67). Madagascar. Rev. R. Baron [C.]. 



'., d. 9 (V. 207 ; 0. 64) Madagascar. 

 &yg. (V.210; C. 70). 



c 



2. Lioheterodon modestus. (Plate XYIII. fig. 1.) 



Heterodon madagascariensis, Giinth. Cat. p. 84 (1858). 



modestus, Giinth. Ann. f Mag. N. H. (3) xii. 1863, p. 356. 



Anomalodon madagascariensis, Steindachn. Novara, Bept. p. 90 

 (1867). 



Closely allied to the preceding, but scales in 21 rows, ventrals 

 159-170; and subcaudals 5-1-62, all in pairs, or a few of the anterior 

 single. Pale brown above, uniform or with two or three more or 

 less distinct darker stripes ; uniform yellowish below. 



Total length 920 millim. ; tail 200. 



Madagascar. 



