, 64 [APRIL, 
A well marked depression exists upon the snout and upper part of the head. 
There are thirteen or fourteen femoral pores in the specimen examined, but no 
pores immediately in front of the anus. Three or four of these pores extend 
beyond the thigh on each side about a line in front of the anus. The under sur- 
face of the extremities is covered with small imbricated scales, which are very 
minutely punctated with black. ‘The under part of the fingers is provided with 
a double row of imbricated scales divided by a median line. The upper surface of 
the tail presents numerous scattered tubercles, the under surface transverse scuta, 
somewhat indistinct. 
Coloration.—Upper part and sides of head yellowish. Upper part of body 
light chocolate color, with numerous minute points of black; upper surface of 
extremities of a lighter color than rest of body. Under part of body and extre- 
mities light straw color. 
Dimensions—Length of head eight lines; greatest breadth five lines. Length 
of body one inch and a half (Fr.) ; of tail two inches. 
Geographical distribution.—West coast of Africa. 
Remarks.—This species differs from all the species of Hemidactylus described 
by Dumeril and Bibron. It is well characterized by the angular plate at the 
chin and the disposition of the rows of tubercles upon the back. 
AcontTIas elegans. 
Specific Characters.— No inferior eyelid; two internasal plates, 
pentagonal, articulating with the rostral; frontal heptagonal, broader 
than long; an interparietal hexagonal, more extended transversely 
than antero-posteriorly; an occipital plate larger than either of the 
others, hexagonal, its supero-external margin hollowed; a parietal 
plate, a fronto-parietal, one supra-ocular, two posterior-oculars; a fre- 
nal, and a freno-orbitar much smaller than the frenal. 
Deseription.—The head ot this animal is small, depressed, triangular in shape 
above, rounded in front; the rostral plate encloses the extremity of the snout and 
presents a slit on each side posteriorly, extending backward and inferiorly in a 
curved direction to its posterior border; immediately above the rostral are two 
internasal plates, pentagonal, their inferior margin articulating with the posterior 
margin of the rostral; the frontal, interparietal and occipital form a longitudinal 
row nearly equal in size, upon the middle and upper part of the head. The in- 
ternasal articulate with each other by their narrowest or internal margin, with 
the frontal, the frenal and the first labial; the frontal with the internasal, the 
interparietal, the freno-orbitar and the supra-ocular; the interparietal with the 
supra-ocular ; and the fronto-parietal with the frontal anteriorly and the occi- 
pital posteriorly ; the occipital articulates in front with the interparietal, later- 
ally on each side with the parietal and the fronto-parietal ; the parietal are oblong, 
inequilateral, longer from behind forward than in the opposite direction; the 
fronto-parietal are hexagonal, larger than the parietal; the supra-ocular are also 
hexagonal; the frenal plate is quadrangular articulating with the internasal, the 
frontal, the supra-ocular, the freno-orbitar and the first labial. The eyes are 
distinct but without an eyelid. They are situated in an interspace formed by five 
scales, and covered by a scale a very little larger than the eye; the inferior of 
the five is the second supra-labial. ‘Three plates margin the upper jaw on each 
side; there are three upon the lower; the most anterior of the upper row is 
quite large, presenting an acute angle forward and upward. The plate upon the 
under jaw, immediately behind the mental, is long and narrow; the nostrils are 
small, oval, nearly a line apart: immediately behind the mental is a transversely 
elongated triangular plate, the apex of the triangle presenting backward. Body 
slender, flattened below; tail long, covered at its extremity with minute trape- 
zoidal scales; body and tail covered with smooth imbricated scales above and 
below: their posterior margin is convex, and they have a striated appearance, 
each scale having from two to five whitish strie; the striation on the under sur- 
face ; is quite remarkable; a single scale in front of the anus. ‘There are twenty 
longitudinal rows of scales around the body. ‘Tongue oval, covered with nu- 
merous small papilla, slightly bifid at its extremity. Marginal teeth very 
