SYSTEMATIC ACCOUNT OF THE SPECIES. 241 
equalling the distance from tip of snout to centre of eye; mental much larger 
than rostral; two slightly enlarged postmentals and a few chin-shields slightly 
enlarged; ventrals smooth, imbricate, rounded, slightly larger than dorsals; 
scales of limbs rather similar to scales of body. 
Colour:— Pale gray, no markings. The specimens examined are evidently 
badly bleached. 
Dimensions:— Tip of snout to vent 25 mm. 
~ Vent to tip of tail a 
Greatest width of head 4 mm. 
Tip of snout to ear 7 mm. 
Fore leg 7mm. 
Hind leg 8.5 mm. 
Remarks:— As to the habits or occurrence in life of this species nothing is 
known. It appears in so very few of the many collections made in Mexico and 
Central America that it must be veryrare. Dr. L. J. Cole made a very extensive 
collection of reptiles in Yucatan for this Museum in 1904 but though he collected 
in Merida the type-locality of this species he never found it there or elsewhere. 
11. SPHAERODACTYLUS DIFFICILIS Barbour. 
Sphaerodactylus difficilis Barbour, Mem. M. C. Z., 1914, 44, p. 265. ‘ 
Type-locality:— Santiago de la Vega, San Domingo. 
Type:— Tyrzr. M.C.Z. 7,834. Paratypr M. C. Z. 7,885. <A. H. Verrill. 
Two Paratypss M. C. Z. 5,444 Puerto Plata. M. Abbott Frazar. 
Distribution:— Haiti and San Domingo. 
Diagnosis:— Small, slender, having moderately small weakly keeled, 
imbricate scales about nine equalling the distance of tip of snout from centre of 
eye; head and neck with longitudinal markings or the head, neck and body 
speckled. 
Description:— Type. M. C. Z. 7,834. Snout rather short,not conspicu- 
ously acute; distance of eye from tip of snout and ear about equal; rostral 
moderate with median grove; nostril between rostral, first supralabial, a large 
supranasal and two smaller scales; two small scales bcrder the rostral behind 
with the supranasals; three large and one small supralabial to below centre of 
eye; superciliary spine present; head above and on sides covered with small, 
elongate, juxtaposed, keeled scales, those on snout enlarged; scales on back 
