236 SPHAERODACTYLUS. 
Dimensions:— Total length 43 mm. 
Tip of snout to vent 22 mm. 
Vent to tip of tail 21 mm. 
Width of head 4 mm. 
Fore leg 6 mm. 
Hind leg 8 mm. 
Remarks:— The only two specimens of this lizard which I have ever seen 
are the two types discussed. They were found the same day under loose stones 
on a dry, rather open, scrubby, hillside pasture. This species is more slender 
than torrei and is much larger with a less acuminate snout than elegans; it differs 
likewise in colouration. The two specimens in hand are exactly alike in pattern. 
7. SPHAERODACTYLUS PACIFICUS Stejneger. 
Plate 1, fig. 3; Plate 13, fig. 1-4. 
Sphaerodactylus pacificus Stejneger, Proc. Biol. soc. Wash., 1903, 16, p. 3. 
Type-locality:— Cocos Island, western coast of Costa Rica. 
Types:— Typr. U.S. N. M. 31,057, P. Biolley. Four Paratypss. 
Distribution:— The type-locality. 
Diagnosis:— Large, very stockily-built, with tiny keeled granular dorsals 
about twenty-three or twenty-four of which equal the distance between tip of 
snout and centre of eye; having two scales separating the large supranasals 
and anterior to this pair a single small scale wedged in the posterior cleft of the 
rostral. Ear-opening horizontal. 
Description:— Paratyrr (U.S. N. M. 31,058). M.C. Z. 18,727. Snout 
not conspicuously pointed, a little longer than distance from eye to ear, about 
once and two thirds the diameter of eye; nostril small between rostral, first 
labial, a large supranasal, and one or two very small scales; rostral large, cleft 
above, the cleft including the small scale anterior to the pair separating the 
supranasals; four supralabials to below centre of the eye; the usual supraorbital 
spine present; top of head covered with small keeled granules somewhat larger 
and flatter on the anterior portion of the snout; back covered with minute 
keeled, granular scales which show a slight tendency to imbricate; about twenty- 
three or twenty-four equalling distance of tip of snout from the centre of the eye; 
ventrals enlarged and imbricate; tail cylindrical, tapering, covered above with 
irregular flat pavement-like scales smaller than ventrals; tail without median 
