plates.  Eyes rather small, lower lid opatic, covered with scales.  Ears oblong, with a large scale in front.  Body fusiform, roundish thick; scales of the back, broad, lozenge-shaped, keeled; keels ending in a dagger point; largest on the hinder parts of the throat and belly; transverse, ovate, 6-sided.  Limbs four, strong.  Toes elongate, compressed, unequal, clawed; tail short, conical, tapering, depressed; with rings of large, broad, lozenge-shaped, dagger-pointed, spinose scales, with a central series of very broad 6-sided smooth scales beneath.

This genus is intermediate between Cyclodus and Egernia, but quite distinct from both.  It differs from Tachydosaurus and Cyclodus in having slender elongated toes like Egernia, in the scales being keeled, and in there being no series of large plates beneath the orbit, and it is easily known from Egernia by the tail being depressed and broad, instead of conical and round.  Like all the genera above named, it appears to be peculiar to Australia.

The Silubosaure.  Silubosaurus stokesii.

REPTILES.  PLATE 1.

Olive brown, varied with black and large white spots; shields of the head white, black-edged.

Inhabits Australia.

EGERNIA, Gray.

Head quadrangular, rather tapering in front.  Head shields convex, rugose.  Nasal shields ovate-triangular, rather anterior, approximate; supranasal none; rostral triangular, erect; internasal lozenge-shaped, as long as broad; frontonasal rhombic, lateral, separate; frontal and interparietal moderate, elongate; frontoparietals 2, rather diverging, contiguous in front; parietal moderate, half ovate.  Temple shielded.  Orbit without any scales between it and the labial shields.  Ears oblong, with 4 small scales in front.  Body fusiform.  Scales of the back, sides, and upper part of the limbs broad, 6-sided, with a large central keel ending in a spine, larger on the loins, those of the nape 3- or 5-grooved, of the throat and belly thin, broad, ovate, 6-sided.  Legs 4, strong.  Toes elongate, compressed, unequal, clawed.  Tail as long as the body, round, tapering, with 6 series of broad 6-sided, keeled, strongly-spined scales, with a series of broad 6-sided smooth scales.

Cunningham’s Egernia.  Egernia cunninghami.

Tiliqua cunninghami.  Gray, Proceedings of the Zoological Society 1832 to 1840.

REPTILES.  PLATE 2.

Olive, white spotted head, brown chin, and beneath white; ears with 3 or 4 pointed scales in front.

Inhabits Australia.

Fam.  AGAMIDAE.

CHELOSANIA, Gray.