The dorsal crest is inconspicuous, verv slightly raised. There 

 may be more than two large labials behind the point of junction with 

 the suborbital ring of scales. Fourteen or fifteen rays or spines 

 can be felt along the dorsal crest and twenty to twenty-three in the 

 slightly developed caudal. The color above is a dull dusky, with 

 several (five) dark brown or black bands across the back. 



In the young, a white longitudinal band runs from above the 

 typanum backward, dying out before it reaches the hip. Another 

 wider white band runs from the nostril to the forelimb and some- 

 times extends farther backward. The throat has four dusky longitu- 

 dinal streaks on its white surfaoe.t 



4. Iguana Saberculata LA.URENTI. One (3469) was taken at 

 Panama, IT. y. of'Cblumbia. 



5. Ctenosaura eompleta BOCOURT. Two specimens (3484- 

 3485) were secured at Panama. 



Although the dorsal crest is complete in both, it is very low and 

 small just above the intersection of the liind limbs. 



6. Holbrookia texana (TEOSOHEL). One specimen (1971) 

 from Chihuahua, Estado de Chihuahua, Mexico, was' presented to the 

 collection by Mr. A. T. Woolman. i 



9. Seeloporus elarkii BAIRD & GIRARD. A fepecimen of 

 this lizard (2915) is from Mazatlan, Mexico, which is the most south- 

 ern locality from whicTa this species has as yet been taken. 



12. Seeloporus variabilis WIEGMANN. Mr. A. J. Woolman 

 presented two ■,1969-1970 to the collection, which he took at Orizaba, 

 Mexico, altitude 1400 feet. ■ • 



13. Seeloporus fulvus BOCOURT. M. Bocourt described this 

 specimen in 1874 from two specimens taken by M. Lataste in Central 

 America. No further specimens have ever been recorded. 



The Hopkins' Expedition were fortunate in securing two more 

 (3525, 3529) of the species at Acajutla, Salvador. 



14. Phrynosoma eoranatum (BLAINVILLE). This species 

 has been secured (S:!^ 1-3323) at Santa Anita, L Cal. 



FAMILY. TEIIDyE. 



17. Ameiva undulata WIEGMANN. Several (2843-2844, 2846, 

 2848-2849, 2851, 2753-2855, 2860-2861, 344.i) were procured at Retalhu- 

 leu, Guatemala, during the winter (May) of 1895. 



18. Ameiva surinamensis (LAURENTI). A large number 

 (3443-3468, 3490-3503) were taken at Panama, U. S. of Colombia, about 

 half of which were adult and tlie other young specimens. 



19. Cnemidophorus sexlineatns (LINNEUS).* Quite a few 

 (2689, 2704-2705, 2709-2710, 2716, 2719, 288) of these lizards were taken 

 at Mazatlan, Mexico. 



FAMILY. SCINCID.E. 



21. Mabaia agilis (RADDI). Four of these skinks (3521-3522, 



t Mr. C. J. Pierson confirms former statements that these lizards can ruia rapidly 

 ove- the surface of deep water without sialcing into it. This seems lo be true for the 

 entire genus, as Lieut. Wirt Robinson in ''A Flying Trip to the Tropics '' Kiverside 

 Press, Cambridge, Mass., 1895, page 4.5, malies the same remarks concerning BadLicits 

 amerlcanus. 



^.' A small black specimen (3.530) of this genus, belonging to the Cnemidophnts deppit 

 Wiegman group, has nine longitunal white stripes. It came from Acajutla, Salvador. 

 For lack of comparable material L hesitate from referring It to auFol the numerous 

 forms. 



