SYSTEMATIC ACCOUNT OF THE SPECIES. 239 



Description: — M. C. Z. 10,937. Panama Bay: Saboga Island, 1904. 

 W. W. Brown. Snout medium and rounded; eye nearer tip of snout than ear; 

 rostral moderate with median groove; nostril between rostral, first supralabial, 

 a large supranasal and one small scale; a single scale separating the supranasals 

 of each side (sometimes the supranasals are separated by a linear series of small 

 scales) fifth supralabial below the centre of the eye; superciliary spine present; 

 head above and on sides covered with small, juxtaposed, swollen granules, those 

 of snout much larger and flatter, scales of back extremely small, juxtaposed 

 granules, the centre of each swollen into what might be considered a keel, about 

 twenty-one or twenty-two equalling the distance between the tip of snout and 

 centre of the eye, mental large, several distinctly enlarged postmentals, gular 

 scales small, roundish, juxtaposed; scales of belly much larger than gulars or 

 dorsals, smooth, very slightly imbricate; scales of limbs enlarged, smooth or 

 very feebly keeled, distinctly imbricate; scales of tail, small, flat not forming 

 distinct whorls, enlarged plates below. 



Colour: — Yoimg with bold cross-bars as follows: — one across neck, one 

 just behind insertion of fore limbs, one broken on midbody region, one lumbar 

 and four on tail. Adults often dotted with dark brown on a hght brown ground. 

 The dots usually in lines. The head and neck is frequently vermiculated with 

 white lines. Some specimens are uniform brown without any marking what- 

 ever. 



Dimensions :— Tip of snout to vent 29 mm. 



Vent to tip of tail ? 



Greatest width of head 5.5 mm. 



Tip of snout to ear 8 mm. 



Fore limb 7.5 mm. 



Hind limb 8.5 mm. 



Remarks: — This species shows very marked variation in colour, some of the 

 phases may be correlated with locality but our material does not show this. 

 Since the other Central American form, glaucus, has enlarged, smooth, imbricate 

 dorsals there does not seem to be any question but that the animal in hand is 

 really Lichtenstein's lineolatus in view of the type-locality and the description, 

 " Squamis dorsi aequilibus, granularibus. Rufescens, capite supra linea mediana 

 et utrinque tribus lateralibus nigricantibus ornato dorso fusco-vermiculato. 

 Long, a rostro ad caud. bas. H" caud. IV ". 



This species seems to range widely through Lower Central America while 



