NO. 7 HERPETOLOGICAL COLLECTIONS COCHRAN 7 



coloration, one male (no. 81760) most nearly resembles the type, 

 although the spots are much less apparent. The other three specimens, 

 including the female, have scarcely a trace of spotting, but there is a 

 distinct dark-bordered light stripe on the flank beginning just anterior 

 to the groin and continuing for some distance onto the tail. The very 

 young specimen, unfortunately too mutilated to be of use in scale 

 comparison, nevertheless shows these posterolateral light lines very 

 plainly, as its body color tends toward sepia, instead of the pale drab 

 or gray characteristic of the adults. 



Relationships. — The new species agrees with argus and caicosensis 

 in general in scalation as well as in having at least the traces of 

 crescentic grooves on the rostral. It differs from caicosensis in having 

 the throat scales entirely smooth, and from argus in having three 

 instead of four supralabials to a point below the center of the eye, 

 and from both these species in its much reduced pattern. It is in- 

 teresting to note that the new species is not closely related to argivus, 

 the only Sphaerodactyl heretofore known from the Cayman group, 

 and which is apparently confined to Cayman Brae. 



SPHAERODACTYLUS CAICOSENSIS, n. sp. 



Diagnosis. — Dorsals imbricate, very heavily keeled, about ii to the 

 standard distance between tip of snout and eye ; no differentiated 

 middorsal zone ; lateral crescentic grooves on rostral more or less 

 apparent ; throat scales keeled, at least laterally ; female with dark 

 stripes on head ; body with dark irregular spots arranged transversely ; 

 flanks and tail with a dark light-edged stripe. Coloration of male 

 unknown. 



Type. — U.S.N.M. no. 81443, an adult female from South Caicos 

 Island, Bahama Islands, July 29, 1930. 



Description of tJic type. — Snout moderately short and broad, its 

 length twice the diameter of the eye ; eye slightly nearer ear than tip 

 of snout ; rostral large, with a median groove behind, bordered by 

 faintly indicated crescentic grooves ; nostril between rostral, an en- 

 larged supranasal, a pair of postnasals of which the upper is the 

 smaller, and the first supralabial ; supranasal s separated from each 

 other by a single small scale ; superciliary spine rather small ; three 

 subequal supralabials to a point below the center of the eye ; a very 

 large first infralabial and a much smaller second and third infralabial 

 to the same point ; top of head covered with keeled scales, larger and 

 hexagonal on the snout, smaller and more elongate between the eyes, 

 very small and nearly round on the occiput ; scales of back small, very 



