FROM SURINAM. 87 



28. Gonatodes Boonii, n. sp. (Plate 7, figs. 1 and 2). 



Habit stout. Head broad, one and two thirds as long as 

 broad, snout short rounded, the distance from the centre 

 of the eye to the tip of the snout equals the distance from 

 the centre of the eye to the earopening. Iuterorbital space 

 narrow, concave ; earopening round and rather small. Limbs 

 moderate, digits aud toes slender, narrow at the base, scales 

 under the basal joint small, subequal. Nails rather strongly 

 curved with three scales at the base, one upper and two 

 sideways. Upper parts covered with small granules, those 

 on the snout but very little larger than those on the back. 



Rostral pentagonal with median cleft, but little broader 

 than high, followed by two rather large post-rostral shields, 

 one on each side of the cleft. Nostril pierced between the 

 rostral, the post-rostral and four granules of the snout. 

 The suture between the rostral and the first labial runs in 

 the direction of the nostril, the latter not being in contact 

 with the first labial. Six upper labials, the fifth small, the 

 sixth very small ; six lower labials, the fourth rather small, 

 the fifth small, the sixth very small. Mental large, in 

 contact with two post-mentals. Gular region covered by 

 small granules. 



The granules on the anterior half of the superciliary 

 rim conical, those on the middle just above the centre of 

 the eye forming small projecting spines. Abdominal scales 

 rather large, hexagonal, imbricate. 



Tail stout, cylindrical, covered at the root on its upper 

 part with granules, somewhat larger than those on the 

 back, on the lower side with large scales, those of the 

 median series not transversely dilated. On the posterior 

 part of the tail (probably regenerated) a series of trans- 

 versely dilated scales is to be seen at the lower side. 



Upper parts dark green, covered all over with larger or 

 smaller lighter spots composed by one, two or more gra- 

 nules of a light green colour. Belly lighter without spots; 

 gular region with large, greenish spots. Tail without spots, 

 below lighter than above. 



Notes from the Leyden Museum , Vol. XXV. 



