FROM SURINAM. 91 



Brown above, lower sides orange-coloured ; a series of 

 light coloured spots aloug the sides of the body from 

 behind the head till above the fore limb ; a double series 

 of light spots on each side of the tail, the lower series 

 much more distinct than the upper one. Upper- and lower 

 labials spotted with black; throat uniform cream-coloured, 

 without black spots. 



This species very much resembles Arthrosaura reticulata 

 O'Shaughn. from Ecuador, but differs from it in the number 

 of transverse rows of scales, iu the form of the frontal, 

 in the arrangement of the praeanal scales, and the arrange- 

 ment of the scales bordering the parietals, as figured by 

 O'Shaughuessy in Proc. Zool. Soc. 1881, pi. XXII, fig. 1. 



One specimen collected by the Gonini-expedition in the 

 Cottica-mountains. 



42. Prionodactylus Kockii, n. sp. (Plate 7, figs 3 and 4). 



Habit slender, snout rather long. A great part of the 

 rostral shield visible from above; frontonasal undivided, large; 

 praefrontals forming a suture; frontal hexagonal, elongate, 

 twice as long as broad, nearly as long as its distance 

 from the tip of the snout; two postfrontals forming a 

 suture; interparietal pentagonal, longer than broad, broader 

 than the interparietals, posteriorly evenly truncate ; median 

 occipital as broad as the parietal, nearly twice as broad 

 as long. Nostril pierced in a single nasal, a loreal and a 

 freno-orbital. Five upper- and four lower labials. Chinshields : 

 one anterior followed by four pairs of large shields forming 

 a suture ; two longitudinal rows of large gularshields. Five 

 collarshields, the three median very large. Ventrals smooth, 

 large, rounded posteriorly, in nineteen transverse rows and 

 six longitudinal rows, those in the middle larger than the 

 outer ones. Dorsal shields hexagonal, elongate, strongly 

 keeled in twenty-six rows from the occipital down to the 

 sacrum ; the scales on the flanks very small. Thirty nine 

 scales round the middle of the body including the ventrals. 

 Four large praeanals, the anterior much larger than the 

 posterior, forming a suture with this latter, the right one 



Notes from the Leyden Museum, Vol. X.X.V. 



