100 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



the snout. Digits considerably dilated, 16 lamellae under phalanges II and 

 III of the fourth toe. Tail somewhat compressed, covei-ed with rather large, 

 equal, strongly keeled scales. 



Color. — Bright purple above, lower surfaces lighter and buffish. Gular ap- 

 pendage large, whitish, with lines and dots of lilac at the base. The under 

 surfaces of the thighs are buff with indistinct wavy bands of pale lilac. 



Head 16 mm. 



Width of head 9 " 



Body 51 " 



Fore limb 33 " 



Hind limb 60 " 



Tibia . 14 " 



4. Basiliscus americanus Ladr. 



Sixteen examples of this widely spread species, which do not appear to differ 

 from typical specimens from Panama. 



5- Enyalioides insulae, sp. nov. 

 • Types. — Mus. Comp. Zool., No. 6,983, Gorgona Island. 



Two specimens, closely allied to E. heterolepis Bocourt. The ventral scales, 

 however, are only very slightly keeled. The spinose lateral scales, considerably 

 enlarged, form three longitudinal series on each side of the back. On the flanks 

 are only a few scattered enlarged scales ; these do not fall into vertical series, as 

 is the case with E. heterolepis. The color of this island race is uniform rich 

 mahogany bi'own above ; ivory or creamy white below. There are forty-one 

 distinct spiny whorls evident upon the tail, which is brown above and below at 

 the tip. 



Head 2.5 mm. 



Width of head 20 



Body 73 



Fore limb . 47 



Hind limb 102 



Tibia 35 



Tail 165 



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6- Iguana tuberculata Laur. 



A single young male. 



TBIIDAE. 



7- Ameiva bridgesii (Cope). 



Four specimens agree perfectly with the descriptions of continental speci- 

 mens, except that in these island examples the keels on the dorsal scales are 

 obsolescent. 



