SHAKES OF IWADAGASCAR. 377 



11. MlCROPISTUODON^, 



Mocqnavd, CR. Soc. Philom. 1894, no. 17, p. 7. 



1. MrcROPisTHODON ocHRACEUs Mocquavd, 1. c. p. 8. 

 Maclagascai' (Nossi Be). 



12. LYCOGXATHOPniS. 



Bouleng. Cat. Sn. i. 23. 317. 



1. Lycognathophis sechellensis. 



Psamviophis seychellensis Sclileg. Phys. Serp. ii. p. 212. 

 Lycognathopliis sechelleusis Bouleng. t. c. p. 317. 

 Seychelles. 



13. BooDox. 



Dum. & Bibr. Mem. Ac. Sc. xxiii. 1853, p. 460 ; Bouleng. Cat. 

 Sn. i. p. 327. 



1. BOODON GEOMETRICUS. 



Lycodon geometrictcs Sclileg. Phys. Serp. ii. p. 111. 

 Booclon geometricus Bouleng. t. c. p. 329. 

 Seychelles. 



14. Lycodon. 



Boie, Isis, 1827, p. 521 ; Bouleng. Cat. Sn. i. p. 348. 



1. Lycodon aulicus. 



Coluber aidiciis Linn. Mus. Acl. Fricl. i. p. 29, pi. xii. iig. 2. 

 Lycodon auliciis Bouleng. t. c. p. 352. 

 Introduced in the Mascarene Islands. 



Opisthoglypha. 



Synojjsis of the Genera. 



I. PriBfroutal not in contact with the upper labials; a loreal sejarating the nasal 

 from the prseocular. 



A. Pupil round. 



Scales in 19 rows ; tail moderate or short (subcaudals 31-76) ; anal 



entire Geodipsas. 



Scales in 21 rows ; tail long (subcaudals 121-175) ; anal divided ; 



loreal once and a half to thrice as long as deep Ithycyphus. 



B. Pupil verticallj' elliptic. 



1. Body cjdindrical. 



Scales keeled, in 19 rows ; snout ending in a long appendage T,angaha. 



Scales keeled, in 25 rows ; subcaudals single Alluaudina. 



