BARBOUR AND NOBLE: THE GENUS CYCLURA. 161 



Diagnosis: — Nasals separated from the rostral by a single row of 

 scales; nasals separated from each other by two rows of scales. Pre- 

 frontals in a double series of three large shields, strongly convex, the 

 posterior pair particularly so, the two rows separated from each other 

 by several rows of small scales, the posterior pair of prefrontals sepa- 

 rated from the median frontal tubercle by a single row of very nar- 

 row scales. Supraorbital semicircles scarcely differentiated from the 

 supraocular scales but somewhat larger than the frontoparietal scales. 

 A single large canthal scale preceded by a small, hexagonal precanthaL 

 Dorsal crest low, not over four millimeters high, reduced on the 

 shoulders, nearly interrupted on the rump but not a distinct break in 

 the whole. Verticils faintly indicated, the limiting row only a trifle 

 larger than the row preceding it. Color very faded in the specimens 

 examined, but probably uniform olive-gray in life, slightly more 

 yellowish on the head and under surface. 



Habitat: — Haiti. 



Description: — Two specimens, a young one, and the head of a half 

 grown individual M. C. Z. 3597, Jeremie, Haiti, 1859, D. F. Weinland. 



Rostral wide, as wide as mental, separated from the nasals by a 

 single row of scales; nasals large, ovoid, perforated by large nostrils 

 posteriorly, separated from each other by two rows of scales ; on each 

 side of the top of the snout, immediately following and adjoining the 

 nasals two rows of three large shields, strongly convex, the posterior 

 pair tubercular, the rows separated from each other by two or three 

 rows of small scales; of these two rows of large scales the posterior 

 pair is nearly as long as the two others together; a large median 

 frontal tubercle separated from this posterior pair of prefrontals by a 

 single row of narrow scales; supraocular semicircles scarcely differ- 

 entiated, but slightly larger than the supraorbital scales and dis- 

 tinctly larger than the frontoparietals; occipital located well forward 

 between the semicircles from which it is separated by two or three 

 rows of small scales, situated on a line between the posterior 

 borders of the orbits; a single large canthal scale preceded by a 

 small, hexagonal precanthal; a well-developed series of strongly 

 keeled suboculars continued backward as a supratympanic series to 

 above the ear; seven supralabials to below the middle of the eye; two 

 or three rows of granules separating the suboculars from the supra- 

 labials; above the angle of the mouth and in front of the lower edge 

 of the ear a large tubercular shield, above it about the middle of the 

 edge of the ear another tubercle almost as large; nine lower labials 

 to the center of the eye; a series of enlarged malar scales, the posterior 



