lO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 92 



Type. — U.S.N.M. no. 81381, an adult male from Booby Island, east 

 of Mariguana Cay, Bahama Islands, taken July 21, 1930. Snout 

 relatively short, its length only twice the diameter of the eye; eye 

 slightly nearer ear than tip of snout; rostral large, with a median 

 groove and a more or less distinct crescentic lateral groove; nostril 

 between rostral, one large supranasal, two postnasals and the first 

 supralabial ; supranasals separated from each other by a single scale ; 

 superciliary spine moderate in size ; three large supralabials to a point 

 below the center of the eye, with a very small fourth one terminating 

 the series; three infralabials to the same point, the first one very 

 greatly enlarged, this series terminated likewise by a very small fourth 

 scale ; top of snout covered with keeled polygonal scales which decrease 

 considerably in size between the eyes and become almost granular on 

 the occiput, about 25 in a straight line across the head just anterior to 

 the superciliary spine ; scales of back small, keeled, imbricate, the mid- 

 dorsals slightly smaller than those of flanks ; about 13 middorsals and 

 about 1 1 dorsolaterals equalling the standard distance from tip of snout 

 to center of eye ; no middorsal granular zone ; mental large, followed by 

 two postmentals which are only slightly enlarged ; scales of anterior 

 gular region small, very faintly keeled, very slightly imbricate ; scales 

 of chest and belly smooth, rounded, imbricate ; about 13 ventral scales 

 to the standard distance, fairly regular in size ; scales of limbs keeled 

 above, smooth below, almost granular posteriorly ; 14 smooth lamellae 

 under the fourth toe ; scales of tail above keeled, imbricating, below on 

 the median line enlarged transversely into a series of irregular hex- 

 agonal plates ; " escutcheon " of male prominent and wide, extending 

 on the femur two-thirds of the distance to the knee, composed of 

 thickened white scales in which traces of pigment appear only at the 

 extreme posterior borders of those on the femur. 



Dliitciisious. — Head and body. 38 mm ; tail, 48 mm ; width of head, 

 7 mm ; tip of snout to ear, 9 mm ; fore leg, 8.5 mm ; hind leg, 11 mm. 



Coloration in alcohol. — Upper parts fawn color with indistinct 

 dorsal punctulations of sepia; a trace of a sepia-edged nuchal cres- 

 centic marking ; tail with pronounced light chevrons edged with sepia, 

 and with an interrupted lateral sepia stripe; top and side of head 

 pale drab, immaculate; underparts pale olive-bufif with very minute 

 gray dots on the throat, and heavier dots below the thighs and on the 

 edges of the enlarged plates beneath the tail ; limbs immaculate, drab 

 above, pale drab below. 



Faratypes. — Seven specimens — three adult males (U.S.N.M. nos. 

 81379, 81380, and 81382), three females (nos. 81376-8) and a half- 



