158 bulletin: museum of comparative zoology. 



the suboculars; no tubercular or swollen scales in the temporal 

 region, only a few enlarged scales below the angle of the mouth, 

 eleven infralabials to the middle of the eye; a double row of small 

 slightly keeled malar scales separated from the infralabials by one 

 or two rows of scales of the small size; dorsal and ventral scales 

 small; from the nuchal fold along the median line of the neck and back 

 a row of blunt spines ; on the neck the spines about half a centimeter 

 high; the crest broadly interrupted on the shoulders and rump; 

 forty-seven spines in the dorsal crest between these two points, the 

 first four and the last four spines of this series very much reduced, 

 the largest spine about three millimeters high; upper surface of limbs 

 with slightly imbricated, keeled, posteriorly pointed scales consider- 

 ably larger than the body-scales; on the upper arm about twenty on 

 the lower arm about twelve of these scales to the vertical diameter 

 of the tympanum; twenty-three femoral pores; inner side of second 

 toe with one comb, of third toe with two combs each consisting of 

 three prominent and two small lobes; tail compressed, covered with 

 obliquely keeled scales in vertical rows, forming distinct verticils; 

 the limiting row of each verticil formed of strongly keeled scales; 

 tail surmounted by a serrated crest, similar to the body-crest but 

 formed of larger and sharper spines. 



Coloration: — Ground tone of dorsal surface brownish gray; mimer- 

 ous but very faint yellow-brown reticulations extending from head to 

 tail; these reticulations forming faint yellowish blotches on the head; 

 tail uniformly yellowish gray; sides of head and gular region tinged 

 with blue; chest smoky; rest of ventral surface the same color as tail. 



Material e:c amine d. 

 The specimen described. 



Cyclura collei Gray. 



Plate 9; Plate 15, fig. 5, (i. 



Gray, Cat. lizards British mus., 1845, p. 190. Barbour, Mem. 

 M. C. Z., 1914, 44, p. 298. 



Diagnosis: — Nasals separated from the rostral by several rows of 

 fine granules. Prefrontal region covered by a series of three large 

 shields on each side, each shield slightly swollen and convex; the 



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