Dr. A. Giintlier on some Heptiles from Madagascar. 359 



in an individual 13 inches long' the horn is as long as thediaraeter 

 of the orbit, covered with large smooth scales, and concave 

 above ; it is as long as in the specimen of Chamceleon maltJie 

 figured on pi. xii. of the paper quoted. From that species G. 

 hrevicornis is readily distinguished bj the posterior notch be- 

 tween the occipital flaps and the large scutes covering these 

 flaps. In younger specimens the horn is only half or two thirds 

 of the length of the orbit, or still shorter. 



Liophis quinqiidineatiis^ sp, n. 



Scales in 21 series. Head short ; snout rather pointed ; 

 eye small, with round pupil. Rostral shield protruding, 

 extending on to the upper surface of the head ; anterior 

 frontals small, one third the size of the posterior ; vertical 

 rather longer than broad ; occipitals somewhat shorter than 

 vertical and postfrontals together. Loreal short; one pras- 

 ocular, not reaching the vertical ; two postoculars. Eight 

 upper labials, the fourth and fifth entering the orbit. Tem- 

 porals 1 + 2 + 2, the foremost in contact with the lower post- 

 ocular only. Three lower labials, in contact with the anterior 

 chin-shields. Ventrals 148 ; anal divided ; subcaudals 46. 

 Posterior maxillary tooth strong. 



U])per parts brown ; a broad margin round the upper jaw 

 brownish yellow, both colours being divided by a sharply- 

 defined line. Two narrow dark lines on each side of the body, 

 and one along the median row of scales on the back. Lower 

 parts uniform whitish. 



Two specimens from Betsileo. Total length 17 inches, 

 the tail measuring 3 inches. 



Pseudoxyrhopus microps^ sp. n. 



Jan described under the name of HomalocepTialus a genus 

 of Colubrine Snakes from Madagascar which he associated 

 with the Coronellines. I am inclined to place it with the larger 

 and more-developed Colubers ; and whilst admitting the 

 Snake described by him as the type of a distinct genus, I am 

 compelled to change the name, which is preoccupied in Ento- 

 mology. The character of mixed (simple and paired) sub- 

 caudals must be set aside in the diagnosis of the genus, as a 

 second species (described here) possesses paired subcaudals only. 



27* 



