NATURAL SCIENCES OF PHILADELPHIA. 121 



rows. Three loreal rows, the lower continued below the suborbital. Labials 

 5 — 6 ; two rows infralabials, the inner shorter, of broader scales, the first pair 

 in contact. Auricular meatus large, no marginal scales. 



Scales of dorsal region small, not larger than ventral, little larger than 

 lateral, not longer than broad, with a keel on the distal half and obtuse mucro. 

 They are in series, which converge upwards and backwards. Sixty-nine series 

 from rump to occiput ; fourteen across the nape. A broad granular band ex- 

 tends from the ears to more than the length of the humerus behind the axilhe. 

 A pair of longitudinal folds extend from above and below the meatus, and 

 unite half-way to the axilla, to which point the single fold extends. Another 

 extends along the side. 



Lateral and abdominal scales smooth, the latter rounded, smooth, occasion- 

 ally slightly notched; gulars entire ; caudal scales small, in whorls, strongly 

 keeled. Extended fore limb reaches -66 to groin ; hind limb to union of side 

 folds of neck. 



In. Lin. Lin. 



Total length (tail mutilated) : 5 11-2 



Length to vent 2 V Length to orbit 2-5 



" axilla 11-5 Width of head 5-.') 



" meatus of ear 1 Lengthofpes 10 



Color above brilliant green, with a double series of black dorsal spots, with 

 angles projecting laterally, which posteriorly meet similar angles from a late- 

 ral series of larger deep black spots. The green continues as a band to orbit. 

 A series of vertical black bars on sides ; limbs green-black, cross-banded ; tail 

 brown-black ringed; top of head black, brown and green specked. Lower jaw 

 black-barred. Belly light green. 



From 603. Museum Comparative Zoology, Cambridge. From Chili. 



LIOCEPHALUS Gray. 



Having had a large number of individuals of this genus at my disposal, as 

 the species are but little known I give the following synopsis. Gray, who 

 gives the fullest list (Catalogue Sauna Brit. Mus. 1845), enumerates five. There 

 are at present fourteen known. 



L Several series supraorbital scales ; no transverse plates. Abdominal 

 scales smooth. 

 L. o r n a t u s Gray, Catal. L. t r a c h y c e p h a 1 u s Dum., Catal. Method. 

 The former from Guayaquil, the latter from Bogota. 



IL Transverse series of plates on the supraorbital region ; abdominal 

 scales smooth. 



a.. Parietals and interparietals united. 

 Supraorbital region scaled in front ; a black spot on 



throat. Gallapagos Is L. grayi. 



a*. Parietals and interparietals distinct ; the 

 former transversely divided. 

 Three pairs frontonasals ; three interparietals ; a black 



spot on throat. Equador L. iridescens. 



ax. Parietals and interparietals distinct ; the 

 former longitudinally divided. 



f3. Four pairs frontonasals (four rows plates 

 across front). 

 Outer parietals larger than inner ; interparietal short, 

 triangular; two rows scales above infralabials; 

 tail crest high. Brown, with many light cross- 

 bars L, e r c m i t u 3 . 



1868.] 9> 



