NATURAL SCIENCES OP PHILADELPHIA. 69 



fourteen to sixteen. One or two anterior preanals larger than any of the four 

 or six marginal. Two series of tibial shields, the internal imperfect, six plates 

 in the external, the second and third very large. External digit extending 

 beyond the hip of the internal. General color light olivaceous brown, shaded 

 with yellow on the head and extremities. A series of irregular spots, forming 

 a broken band, extends from above the axillary region to the groin. Beneath 

 yellowish. Total length 13 in. ; head and body, 4 in. 



Hab. Cuba. Mus. Philada. Academy. Washington. Cambridge. 



A. trilineata Gray, Catal. Liz. Brit. Mus. 19. 



Supraoculars three, marginals five. Gular scales minute ; four series of 

 moderate plates on the antero-pectoral fold. Temporal region bounded above 

 and anteriorly by plates. Antebrachial and brachial plates continuous, the 

 latter little dilated. Postbrachials large, dilated. Ten rows of abdominal 

 plates. Eight series of femoral plates ; fifteen pores ; median preanals larger 

 than posterior. Three tibial series, seven in the external, the second and third 

 very large. External posterior digit extending beyond the internal. Above 

 olivaceous, with a median yellowish band, which covers a width of four scales 

 anteriorly, six posteriorly. A light lateral line extending from the temporal 

 angle, bounded beneath by a more or less irregular black band, and above, in 

 adult specimens, by another, very narrow and irregular in its superior outline, 

 A light line extends from the ear to the groin, and a trace of a third is some- 

 times seen beneath it Sides posteriorly, and anterior and posterior extremi- 

 ties coarsely vermiculated and varied with black and light olive. Gular and 

 prethoracic regions black. Total length 10 in. ; head and body 3 in. 



Hab. Cuba. Mus. Washington. Phila. Acad. 



This animal appears to be identical with that described by MM. Cocteau and 

 Bibron, and by the authors of the Erpetologie Generale, as the young of the A. 

 auberi. Small specimens of the latter, however, resemble the adult closely, 

 while the trilineata reaches a size nearly equal to that of the full grown 

 auberi. It nevertheless offers no distinctive marks beyond those of colora- 

 tion. We should therefore suspect it to be the female of the latter, were it not 

 that some of the specimens appear to be males. While the opinion expressed 

 in the Hist, de l'Isle Cuba is entitled to much respect, I accept for the present 

 that of Dr. J. E. Gray as most tenable. 



Compared with the female of A. thoracic a, it differs as follows: The 

 continuity of the brachials and antebrachials is not interrupted by small scales ; 

 the postbrachials are larger; there is a single large external palmar tubercle 

 instead of two of equal size. The vermiculated banding of the extremities does 

 not exist in the thoracica, and the vertebral band is much narrower. There 

 are no calcaneal spines. 



A. d o r s a 1 i s Gray, Ann. Nat. Hist. i. p. 277. 



A. Sloanei Dum. & Bibr., v. 107 



Five occipitals, all short, especially the median. Temporal region bounded 

 anteriorly and superiorly by plates. Three supraorbitals, five marginals, the 

 second longest. Median gulars small ; scales of the mesoptycbis moderate, 

 in five rows. Premaxillary teeth ten, the external on each side sometimes 

 wanting. Brachial plates small, subhesagonal. Antebrachials usually not 

 continuous with them, sometimes confined to the terminal portion of the fore- 

 arm. Postbrachials large, transverse. Posterior preanals largest ; one or two 

 anterior plates. Femoral plates in nine to eleven rows medially; pores twenty- 

 three to twenty-five. Three tibial series, the internal minute, the median 

 incomplete, the external of six or seven plates, the second, third and fourth 

 large. Above olivaceous, darkest superiorly. A median vitta commences at 

 the occiput and extends to the crural region ; in the former region it is narrow, 

 in the latter it occupies nearly the whole dorsal surface. Four longitudinal 

 series of spots upon each side, those of the two superior elongate, sometimes 



1862.] 



