30 Dr. A. Giinther on new Species of Snakes 



Leptognathus annularis. 



Scales smooth, in fifteen rows, the vertebral scales being 

 enlarged, hexagonal. Habit slender ; neck very thin ; head 

 broad and short. Eye of moderate size, with vertical pupil. 

 Anterior frontals short and small ; posterior frontals large, 

 extending down on the sides of the snout, and forming the 

 antero-superior part of the orbit. Vertical with nearly parallel 

 outer edges, ancl with a right angle behind, shorter than the 

 occipitals. Loreal broadly entering the orbit ; a small sepa- 

 rate praeocular below. Two postoculars. Seven or eight upper 

 labials, the fourth and fifth or the fifth and sixth entering the 

 orbit. Temporals 1+2 + 3. The first pair of lower labials 

 not in contact with each other. Four pairs of chin-shields, 

 the anterior pair the smallest, the second the largest, much 

 longer than broad. Ventralsl64; anal entire; subcaudals 

 113. Upper parts light brownish powdered with darker, lower 

 yellowish mottled with brown. Body and tail encircled by 

 black rings, which are shorter than the head, but wider than 

 the interspaces ; there are about forty of these rings on the 

 trunk. Head irregularly spotted with brown. 



One specimen from the elevated country of Costa E,ica, near 

 Cartago. Total length 17^, tail 6 inches. 



Leptogrnathus Copei. 



Scales smooth, in fifteen rows, those of the vertebral series 

 scarcely twice as large as those of the adjoining series. Habit 

 very slender and compressed ; neck exceedingly thin ; head 

 very short and thick ; eye large. One loreal, higher than 

 long ; two narrow pree- and two postoculars. Ten or eleven 

 upper labials, the fourth, fifth, sixth, and seventh, or the fifth, 

 sixth, and seventh, entering the orbit. Ten lower labials, the 

 first pair in contact with each other. Three pairs of chin- 

 shields, the anterior of which is the largest, but not much 

 longer than broad. Temporals 1 + 2. Ventrals 218; anal 

 entire ; subcaudals ca. 140. Ground-colour light reddish grey, 

 with fifteen large rounded brown spots, each with a black and 

 yellow margin ; the anterior extend round the whole trunk ; 

 the following are interrupted along the median line of the ab- 

 domen, and the middle and posterior also along the vei-tebral 

 line, so that each forms a pair of large rounded lateral spots. 

 Each interspace of the ground-colour with a small, ovate, la- 

 teral brown spot, at least in the posterior half of the body. 

 Snout white ; forehead and crown of the head dark brown, 

 this colom' forming a ring round the head, below the eye, and 



