150 bulletin: museum of comparative zoology. 



and rump; 56 spines between these two points. Color above brown- 

 ish green, tinged on the head, shoulders and along the mid line of the 

 back with pale yellowish green. 



Habitat: — Andros Island, Bahamas. • 



The most abundant species still existing in the Bahamas. 



Description: — x\dult male, M. C. Z., 6979, Andros Island, Bahamas, 

 1904, Harvard Bahama Expedition of 1904. 



Rostral as wide as the mental, broadly in contact with the nasals, 

 nasal large, ovoid, and perforated in the posterior half by a somewhat 

 semicircular nostril; each nasal in contact with a rectangular supra- 

 nasal and a slightly larger, triangular postnasal; nasals and supra- 

 nasals broadly in contact in the middle of the snout; each supranasal 

 in contact with a pair of narrow prefrontals which are followed by a 

 very large posterior prefrontal; the anterior and posterior prefrontals 

 form a median suture continuous with the nasal and supranasal suture; 

 all of these scutes covering the upper surface of the snout strongly 

 convex, even tubercular; between the prefrontals and the supraorbital 

 semicircles several rows of large irregular scales; the row in contact 

 with the prefrontals consisting of several very large scales, the largest 

 being about a third as large as the posterior prefrontal; between the 

 semicircles on a line with the anterior end a single large flat scale; the 

 semicircles formed of large tubercular scales clearly differentiated from 

 the slightly swollen scales of the supraorbital or frontal regions; 

 supraorbitals roughly hexagonal and uniform in size; supraorbital 

 semicircles separated by two, partly by four rows of scales, occipital 

 located with its posterior end on a line with the posterior end of the 

 semicircles; scales of the occipital region slightly larger than the 

 frontals, the outer row of occipitals much larger than the others; 

 two rows of scales between the occipital and the semicircles; two or 

 three rows of superciliaries, a single large canthal scale and a short 

 squarish precantlial on each side; canthal scale in contact with two 

 elongate superciliaries, the whole series swollen and slightly keeled; 

 a well-developed series of strongly keeled suboculars continued back- 

 ward as a supra tympanic series; eight supralabials to the middle of the 

 eye, a series of three or four rows of small scales separating the supra- 

 labials from the suboculars; on the anterior edge of the ear three 

 enlarged tubercular scales, preceded by a group of smaller ones, the 

 larger one of which is located above the angle of the mouth near the 

 ear; below the angle of the mouth a regular series of tubercular scales 

 decreasing in size anteriorly; seven infralabials to the middle of the 

 eye; a single row of very large, swollen malar scales; the two anterior 

 ones in contact with the supralabials, the rest separated by a single 



