5, AMBIVA. 3861 
ptychium with numerous small shields. Dorsal granules flat, 
smooth, considerably enlarged on the middle zone of the back. 
Ventral plates in ten longitudinal rows, those of the external row 
small; thirty-two transverse rows; several irregular, enlarged 
preeanal plates. A row of large brachials, hardly continuous with 
a row of large antebrachials; a few large postbrachials. Four 
series of femoral plates ; two series of tibials, inner small. Seventeen 
or eighteen femoral pores. Scales on the upper surface of the tail 
oblique, those on the sides smooth, the others feebly keeled. Olive- 
grey above, the median dorsal zone uniform; on each side three 
white longitudinal lines, the interspaces between them blackish 
brown; limbs reticulated with blackish ; a white, black-edged line 
along the hinder side of the femur and tibia and the anterior side 
of the latter ; lower surfaces greenish white. 
millim. millim. 
Total length ...... 172 From end of snout 
LCA. irate csi eitis'en diesgis 16 to vent........ 62 
Width ofhead .... 9 Fore limb........ 22 
From end of snout Hind limb........ 45 
to forelimb .... 23 Watliawedkns Viscuess 110 
St. Croix, W. Indies. 
a. 9. St. Croix. Copenhagen Museum [P.]. (As typical of 
A, Grstedit.) 
9. Ameiva bifrontata. 
Ameiva bifrontata, Cope, Proc. Ac. Philad. 1862, p. 67, 
? Cnemidophorus divisus, Fischer, Verh, Naturw. Ver. Hamb, (2) iti. 
1879, p. 99, pl. v. 
Nostril between the two nasals ; five occipitals; frontal divided 
transversely, with slight longitudinal keels ; three (or four) supra- 
oculars, the two (or three) posterior entirely surrounded by granules ; 
six supraciliaries ; loreal undivided ; seven upper labials; six lower 
labials; chin-shields, one anterior and seven pairs; gular granules 
enlarged on a band across the throat ; mesoptychial scales about 
the size of the largest granules. Dorsal granules small, smooth. 
Ventral plates in ten longitudinal rows, those of the external rows 
small; transverse rows, thirty-four. Three enlarged preanal 
plates, forming a triangle. One row of large brachial plates sub- 
continuous with the antebrachials, which are in two rows; one 
row of dilated postbrachials. Femoral plates numerous ; tibials in 
three rows. Digits moderately serrated; outer toe not reaching 
quite so far as inner. Femoral pores fifteen. Caudal scales keeled. 
Green above ; two light streaks on each side of the body, the upper 
continued on the tail; two alternating series of roundish black 
spots along the back, and another between each pair of light 
streaks ; hind limbs whitish-spotted ; lower surfaces yellowish. 
