312 CLASS XV. 



Note. — To this division belongs sub-genus Thecadactylus Cuv., 

 with toes sulcate below, the groove receiving a nail. Femoral pores 

 none. 



Sp. Platydadylus theconyx DuM. and Bibr., Geclco rapicauda Houtt. Ver?i. 

 van het Zeemosch Genootschap, 1. 1. fig. i (tail monstrous from regeneration), 

 Geclco Iwvis Dadd. Eept. iv. PI. 5 1, Stellio perfoliatus Schneid. Benkschr. 

 der Akad. zu Miinchen, 1. 1. Tab. I. figs, i, 2 ; in Surinam ; the only species 

 of this sub-genus. 



B) With feet palmate. 



a) With thunib unarmed, rest of fingers ungmiculate. Ptychozomi 1K.VRL. , 

 Pteropleura Gray. 



Sp. Platydactylus homalocephalus Cuv., Lacerta homalocephala Creveld, 

 Magazin der Gesellsch, naturf. Freunde zu Berl. in. 1809, Tab. 8, DuM. et 

 Bibr. ErTpet. Pi. 29; a flat scaly expansion along the sides is thrown round 

 like a cloak upon the belly ; the tail is as if finned with round flat lobes on 

 each side ; in the male pori prceanales are present. This remarkable species 

 occurs in Java and Sumatra. 



b) With fingers all unguiculate. 



Sp. Platydactylus Leachianus C0V. Sub-genus Rhacodactylus FiTZ. 



Hemidactylus Cuv. Toes winged at the base, with first phalanx 

 expanded into an oval disc striated beneath, second phalanx and 

 third round, slender. Tail covered below with a middle row of 

 transverse scutes. 



Sp. Hemidactylus Mahouia Cuv., Geclco incanescens and G. armatus Maxim. 

 Pr. zu WiED ; South America ; — Hemidactylus verruculatus Cuv., Hemidact. 

 triedrus, Bonap. (not Daud.) Faun. Ital. Amfihi, Tav. 54, fig. 2; South of 

 Europe and Northern Africa. 



There is a species of this genus with half swimming-membranes at the 

 feet and a flat tail spinous at the sides. Hemidactylus marginatus Cuv., 

 Stellio platyuriis ScHN. 1. 1. fig. 3, DuM. et Bibr. Erpct. PL 30, fig. 2, from 

 Java. Here also would seem to be the place for the species known only 

 from a figure of Seba {Thesaur. 11. Tab. 103, fig. 2), from which Wagler 

 forms the genus Crossarchus. 



Ptyodactylus Cuv. Toes slender, dilated towards the points, with 

 a disc below folded like a fan, emarginate. Toes all unguiculate, 

 the nail received in a groove below the disc. Femoral pores none. 



Sp. Ptyodactylus Basselquisti DuM., Bibr., Lacerta Gecko Hasselq. Ptyodac- 

 tylus guttatus Rueppell, Reise, Atlas, Rept. Tab. iv. fig. i ; Egypt, Arabia; 

 this species has a round tail. In other species the tail is flat and leaf-shaped, 

 as Ptyodactylus fimhriatus Cuv., Geclco fimbriatus Daud., Merr., Lacep. 

 Quadr. ovip. i. PI. 30, Daud. Rept. iv. PI. 52; the head is very flat; along 

 the sides of the lower jaw, the neck and the whole of the trunk, runs 



