4. ZO.N'OSAURUS. 127 



4. ZONOSAURUS*. 



Cicigua, part., Gray, Orijf. A. K. i.\. Si/n. p. 03. 

 Gerrhonotus, part., Dum. ^- Bibr. v. p. o(J8. 

 Cic-igiia i^nim Gnuj, LSi^-l), Ormj, Cat. Liz. p. 49. 

 Pleurostrichus {iion dray, 1845), Gray, Froc. Zool. Soc. 18G5, 

 p. 042. 



Nostril pierced between the rostral, the fii'st labial, and two 

 nasals; pnetrontal shields present ; no frontoparietals. Lower eye- 

 lid scaly. A strong lateral fold. Dorsal scales forming straight 

 longitudinal and transverse series ; ventrals hexagonal, in longi- 

 tudinal series. Subdigital scales smooth or tubercular. Tongue 

 nearly entirely covered with rhomboidal papilla3. 



Madagascar. 



^o" 



Si/nojjsiii of the Species. 



Interparietal usually absent ; four 

 upper labials anterior to the sub- 

 ocular : 1 G to 22 femoral pores on 

 each side 1. madajascariensis, p. 127. 



A small interparietal ; four upper 

 labials anterior to the subocular ; 

 10 to 15 femoral pores 2. ornatus, p. 128. 



Three upper labials anterior to the sub- 

 ocular ; 10 to 1-3 femoral pores .... 3. rujipes, p. 128. 



1. Zonosaiirus madagascariensis. 



Cicigna madagascariensis, Gray, Cat. p. 49. 

 Cicigna madagascariensis, Gray, Griff. A. K. ix. Syn. p. 04. 

 Gerrhosaurus bifasciatus, Duin. Sj- L'ibr. p. .375, pi. xlvii. 



madaga.«cariensis, Boetfy. Ahh. Scnck. Ges. xi. 1877, p. 35. 



(Cicigna) madagascariensis, Boetfy. Ahh. Senck. Ges. xi. 1879, 



p. 471, and xii. 1881, p. 449. 



Frontonasal forming a suture with the rostral and with the frontal ; 

 four upper labials anterior to the subocular ; interparietal (usually) 

 absent. Dorsal scales striated, with a strong median keel in the 

 young, which becomes more feeble or disappears entirely in the 

 adult ; they form 22 or 24 longitudinal and 50 to 54 transverse 

 series, counting from the parietal shields to the base of the tail ; 

 ventrals in 8 longitudinal series. 16 to 22 femoral pores on each 



* The following species are referred to Zonosaiirus merely on account of 

 their habitat, as unfortunately nothing in Grandidier's diagnoses affords a clue 

 to their position in the system : — 



1. GerrhoMurus quadrilineatus, Grandid. Rev. et Mag. Zool. xis. 1867, 

 p. 233. — Tullear, Madagascar. 



2. G. laticaudus, id. eod. loc. xxi. 1869, p. 341.— Fierin, Madagascar. 



3. G. karsteni, id. ibid. — Fierin. 



4. G. (sneus, id. Ann. Sc. Nat. (.5) xv. 1872, art. 20, p. 8.— Madagascar. 



