264 SPHAERODACTYLUS. 
Diagnosis:— Large having rather large but very bluntly keeled dorsals, a 
middorsal granular zone, about nine dorsals equal to distance of tip of snout 
from centre of eye; spotted. 
Description:— Taken from the largest Corypr. Snout rounded; eye about 
midway between ear and tip of snout; rostral very wide but shallow with the 
usual median groove; nostril between rostral, first supralabial, a medium sized 
supranasal and two small scales; two fairly large scales border the rostral be- 
tween the two supranasals; third supralabial, a very long one, reaches to below 
the centre of the eye; superciliary spine well developed; head above and on sides 
covered with small slightly elongate scales, somewhat enlarged and flattened on 
the snout; scales of back large, bluntly keeled, showing a slight tendency to 
imbricate about nine scales in the distance equal to that between tip of snout and 
middle of eye; a middorsal zone of small granular scales which is very narrow 
and best developed posteriorly; mental large, deeper than rostral; one very large 
and several smaller infralabials; no well distinguished chin-shields; scales of 
chest and belly smooth; tail long slender with enlarged plates below. 
Colour:— Light tan-brown with spots and spots joined into streaks of 
darker brown; throat nearly white, belly pale gray-brown. 
Dimensions:— Tip of snout to vent 31 mm. 
Vent to tip of tail ? mm. 
Greatest width of head 6 mm. 
Tip of snout to ear 8.75 mm. 
Fore leg 9 mm. 
Hind leg 11.5 mm. 
Remarks:— Garman collected the types and it was beyond doubt the 
opportunity to observe Antillean reptiles in life which the Buaxe Expeditions 
gave him that resulted in his learning that the fauna of each island is generally 
distinct through isolation. Earlier writers down to Giinther and even Boulenger 
in his earlier years had believed that species had a wide and more or less hap- | 
hazard range throughout the Island chain. Garman first showed that most 
species were confined to single islands or groups of islands closely related geo- 
logically. 
30. SPHAERODACTYLUS BECKI Schmidt. 
Plate 23, fig. 5-8. 
Sphaerodactylus becki Schmidt, Bull. Amer. mus. nat. hist., 1919, 41, p. 520. 
Type-locality:— Navassa. 
