110 On neic Snakes in the British Museum. 



preocular, the prefrontal in contact with the third upper 

 labial ; temporals 1 + 1 ; seven upper labials, third and fourth 

 entering the eye ; tour lower labials in contact with the 

 anterior chin-shields, which are slightly shorter than the 

 posterior. Scales in 15 rows. Ventrals 211 ; anal divided ; 

 subcjiudals 27, the six anterior entiie. Tail ending in an 

 obtuse point. Ten triads of black annuli on the body, the 

 central ajinulus broadest, its width equal to the space sepa- 

 rating the triads, white spaces (in spirit) with black dots; on 

 the belly, the black bars nearly as broad as the white ; one 

 triad on the tail ; head black above, with a white cross-band 

 behind the eyes, the posterior tiiree-tifths of the frontal and 

 the anterior two-thirds of the parietals invulved in it. 



Total length 365 ram. ; tail 28. 



A single teniale specimen from Venezuela, received from 

 Dr. F. Werner in 1900. 



Appears to come very near E. gravenhorstii, Jan, which is 

 only known to me from the description and figure. 



Leptognathus hammondii. 



Body slender, strongly compressed. Eye large. Rostral 

 nearly twice as broad as deep, not visible from above ; inter- 

 nasals about half as long as the prefrontals ; frontal as long 

 as broad, as long as its distance from the end of the snout, 

 much shorter than the parietals ; nasal divided ; no preocular, 

 loreal and prefrontal entering the eye ; two large postoculars, 

 with a small third between them and the eye ; temporals 

 1 + 1 or 1+2; eight upper labials, third and fourth or 

 second, third, and fourth entering the eye, sixth very 

 large ; first lower labial in contact with its fellow behind the 

 symphysial; two pairs of chin-shieldsj the anterior as long as 

 broad. Scales in 15 rows, vertebrals enlarged, as long as 

 broad on the posterior half of the body. Ventrals 210 ; anal 

 entire ; subcaudals 121. 15 black annuli on the body, 10 on 

 the tail, separated by much narrower white ones ; head black, 

 with white vermiculation on* the upper head-shields, on the 

 sides of the snout, and on the chin, white on the temples and 

 on the occiput. 



Total length 410 mm. ; tail 120. 



A single female specimen from Guatea, Western Ecuador, 

 altitude 2900 feet, from the collection of Mr. G. Hammond. 



Near L. gracilis, Blgr., likewise from Western Ecuador, 

 which it resembles in the coloration, but different in the 

 labial and temporal scutellution and in the more enlarged 



