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:— Young 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 ona light 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 7.5mm. 
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 utringue tribus lateralibus nigricantibus ornato dorso fusco-vermiculato. 
Long. a rostro ad caud. bas. 14”’ caud. 11” ’’. 
This species seems to range widely through Lower Central America while 
