122 PROCEEDINGS OF THE ACADEMY OF 



/?/?. Three pairs frontonasals. 



y. Outer parietals much larger than inner. 

 Top of head smooth ; plates of front wide ; interparie- 

 tal long and narrow ; one row above infralabials. 



Light olive. Bahamas, Cuba L. carinatus. 



yy. Outer parietals narrow, equal inner. 

 L. vittatus Hallow, and L. macropus Cope, both from Cuba. L. 

 schreibersii {Fristonotus schreibersii Gravenhorst, not L. schreibersii Gray 

 = L. vittatus), and L. melanochlorus Cope, from Hayti. 



00. Two pairs of frontonasals. 

 Scales smaller ; temporal scales small, keeled ; of 



front much keeled ; auricular scales elongate ; 



interparietal very small. Hayti L. raviceps. 



Scales larger ; temporals large, smooth ; auriculars 



short, thick ; scales of front little keeled. From 



Hayti L. personatus and L. t r ig e m i n a tu s . 



The last two are much alike in structural features, but differ greatly in 

 coloration ; they do not appear to be sexes of the same animal, as I have seen 

 both (-J* and 9 of the latter. 



III. Transverse series supraorbital plates ; abdominal scales keeled. 



Scales on nape in 5 — 1 — 5 rows ; seven supraorbitals ; frontal scales many, 

 keeled. 



L. h e r m i n i e r i Dum. Bibr., from Martinique. 



I am not acquainted with L. m a c 1 e ay i Gray, from Cuba ; it is probably 

 allied to the L. carinatus and L. vittatus. 



LlOCEPHALUS EEEMITUS CopC, Sp. UOV. 



Head moderately elongate, profile an inclined plane. Front with four cross- 

 rows of plates posterior to supranasals, the posterior smallest ; two pairs of 

 internasals, separated from each other, the anterior from the rostral also ; the 

 posterior pair of the same in line and continuous with the divided frontal. 

 Interparietal very short, the parietals largely in contact behind, the outer twice 

 as wide as the inner. All the scales of head smooth, except the supraorbitals. 

 The latter weakly keeled, six on each side, separated by one row scales from 

 supraorbitals ; also by one row small scales from superciliaries. Parietals 

 bounded externally by two rows larger scales, then minute scales, then medium 

 keeled preauriculars. Auricular scales elongate, four. Postauriculars not 

 granular. Scales above large, eight rows on median nuchal region. Dorsal 

 crest high on tail, elsewhere moderate. Lateral and abdominal scales smaller 

 than dorsal. Scales of lower surfaces entire, the preanals smaller, keeled. 

 The muzzle marks the end of the metacarpus on the extended fore limb, and 

 the front of the orbit the longest toe. Tail moderately compressed. Folds of 

 side of neck strong ; two oblique, one nearly horizontal. Scales of tail shiny, 

 keeled below except at basis. 



Coloration plain. Ground dark olive-brown, with a deep brown dorso- 

 lateral longitudinal shade, connected by numerous indistinct cross-bars, which 

 are light margined behind. Lower surfaces brown, with numerous scattered 

 whitish scales, which are most thickly gathered on the pectoral region. A 

 dark brown spot between eye and ear. 



In. Lin. 



Length from end muzzle to vent 2 55 



" '• to ear 8 



" of hind foot 13-5 



Width of head 6 



One specimen of this species was sent to the Smithsonian Institution by W. 

 J. Rasin, from the island of Navassa, W. I., which lies to the south-west of St. 

 Domingo, in line with Jamaica. 



[March, 



