130 SCINCID.. 
2. Tracheloptychus petersii. 
Tracheloptychus petersi, Grandid. Rev. et Mag. Zool. xxi. 1869, 
p. 339. 
“Dorsal scales finely striated. A light brown band on the middle 
of the back, between two dark brown streaks. A greyish streak 
and an irregular reddish band with a few small white spots on 
each side. Flanks greyish, barred with white and red. Hind 
limbs grey; inner face of thigh whitish, with a longitudinal black 
shaft. Belly white. Head with scattered black spots.” 
Total length 20 centim. 
Mourounbé. 
Fam. 18. SCINCIDA. 
Scincoidiens, part., Cuvier, Réegne Anim. ii. 1817. 
‘Scincide, part., Anguide, part., Gray, Ann. Phil. (2) x. 1825. 
Cordyloidea, part., Scincoidea, part., Gymnophthalmoidea, part., 
Fitzinger, Neue Classif. Rept. 1826. 
Lacerte autarchoglosse, part., Angues, part., Wagler, Syst. Amph, 
1830. 
Scinci, part., Gymnophthalmi, part., Wieymann, Herp. Mex. 1831. 
Scincide, part., Gymnophthalmide, part., Rhodonide, Acontiads, 
Gray, Ann. N. £. ii. 1888-389. 
Chaleidiens, part., Scincoidiens Saurophthalmes et Ophiophthalmes, 
part., Duméril & Bibron, Erp. Gén. v. 1889, 
Gymnophthalmide, part., Scincide, part., Ophiomoride, Sepsidee, 
Acontiade, Gray, Cat. Iiz, 1845. 
Scincide, Sepside, Acontiidee, Cope, Proc. Acad. Philad. 1864. 
Scincidee, Boulenger, Ann. § Mag. N. H. (5) xiv. 1884. 
Tongue moderately long, free and feebly nicked in front, covered 
with imbricate scale-like papille. Dentition pleurodont; teeth 
conical, bicuspid, or with spheroidal or compressed crowns; the 
new teeth hollow out the base of the old ones. Pterygoid teeth may 
be present. 
Premaxillary bones two, sometimes incompletely separated ; nasal 
double; frontal single or double; parietal single; postorbital and 
postfrontotemporal arches complete, osseous; interorbital septum 
and columella cranii well developed; infraorbital fossa present, 
bounded by the maxillary, the transverse bone, the palatine, and 
often also by the pterygoid. Skull with bony dermal plates over- 
roofing the supratemporal! fossa. 
Limbs present or absent; pectoral and pelvic arches constantly 
present. Clavicle dilated and usually perforated proximally ; inter- 
clavicle cruciform. Ossified abdominal ribs are absent. 
Body protected by bony plates underlying the scales, which are 
cycloid-hexagonal, rarely rhomboidal, imbricate, arranged quincun- 
cially. These plates provided with symmetrical tubules, which 
