306 CLASS XV. 



Basiliscus Laur., Cuv. (species from genus Basiliscus Daud., 

 Merr., add Corythceolus Kaup). Head crested posteriorly by an 

 erect cutaneous fold, covered with small scutella. Palatine teeth 

 distinct. Back and tail to the very end keeled with a row of erect 

 scales. Throat lax, rugose; neck folded transversely. Scales of 

 back keeled, disposed in transverse rows. Femoral pores none. 

 Toes of hind feet denticulate. 



Sp. Basiliscus mitratus Daud., Lacerta Basiliscus L., Seba Thes. i. Tab. roo, 

 fig. 4 (fig. copied in Houttuyn Natuurl. Hist. i. 6, Tab. 52, fig. i), Daud. 

 B^pt. III. PI. 42, GuEE. Iconog7\, Bept. PI. 11, fig. 2; Surinam, West 

 Indies. In some adult species (probably male) the membranous crest on 

 the back and tail is very high and is supported by the spinous processes of 

 the vertebrae. 



B. With teeth set ujwn the margin of jaws and concrete with 

 jaws. [Palatine teeth none.) 



t With femoral pores distinct. 



Histiurus Cuv. (and Physignathus ejusd.), Lophura Gray. 

 Membrane of tympanum superficial. Back crested. Toes of hind 

 feet surrounded by a membrane or denticulate. Scales of back 

 carinate, less than those of abdomen. Tail long, compressed. 



Sp. Histiurus amhomensis Cuv., Lacerta amboinerisis Schlosser, Epistola ad 

 F. Dejean, Amstelodami, 1768, 4to, Cuv. B. Ani., ed. ill., Bept. PI. 15, 

 fig. I ; a large species from Celebes, Amboyna, &c. In full-grown male 

 specimens the spinous processes of the anterior caudal vertebrae are much 

 elongated, and support a high crest vs'hich rests on the fore part of the tail 

 like a dorsal fin; — Histiurus ^^^lysignathus DuM., Bibe., Physignathus cocin- 

 cinus Cuv. B, Ani., sec. ed. PI. 6, fig. i, Guerin Iconogr., Bept. PI. 9, 

 fig. 2. 



CMamydosaurus Gray. Head scaly. Membrane of tympanum 

 superficial. Back not crested. Scales lanceolate, keeled. A 

 folded, scaly, ample membrane covering tlie neck like a cloak, 

 affixed above tympanum on each side. Toes simple. Tail very 

 long, round. 



Sp. Clilamydosaurus Kingti Gray, Griffith's Animal Kingdom, ix. Plate 

 opposite to p. 217, DuM. et Bibr. Erpetol. PI. 45; New Holland; this 

 species attains a considerable size, like the Histiurus of Amboyna and the 

 Iguanas of America. 



ft With femoral pores none. 



a) With hiyid feet tetradactylous. 



