The hallux, or hind toe, of this bird appears to be more closely united to the fore toes, and to be situated more in front than is usual among the Terns:  it is also to be observed, that the side of the nail of the middle toe is considerably dilated, although not serrated, similar to what is observed among the Pelecanidae.  These characters offer a corroboration of the affinity of the Sternae to the family of the Pelecanidae, and particularly to the genus Phaeton, which approaches the Terns more closely than any other group of that family, in the smaller size of the membrane that unites the toes (see Linnean Transactions 14 505).  It may also be stated on the other hand, that the same membrane of the Sterna pelecanoides deviates from its own genus, and approaches the Pelecanidae, in its being more dilated than usual.  The wings are longer than the tail for a considerable extent, by which our bird also evinces another character, in common with the long-winged Tachypetes, or Frigate bird.

14.  Larus georgii (n.s.)

L. albus, dorso alisque nigris; rectricibus albis, fascia media atra.

Rostrum flavum, apice rubro; mandibulae inferioris gonide maxime angulata; remiges primores atrae, secundariae supra nigrae apice albo, infra albae; tectrices inferiores albae; pedes flavi.

Longitudo corporis, 28; alae, a carpo ad remigem primam 18 3/4; mandibulae, superioris ad frontem, 2 1/3, ad rictum, 3 1/6; tarsi, 2 11/12; caudae, 8 1/2.

This bird was found at King George the Third’s Sound, on the South-west Coast, in the vicinity of Seal Island.

...

REPTILIA.

BY JOHN EDWARD GRAY, ESQUIRE, M.G.S.

Genus CHLAMYDOSAURUS.  Gray.

Capite depresso; membrana tympani aperta. 
Gula pennulis plicatis ornata. 
Pedibus quatuor. 
Digitis quinque, elongatis, simplicibus. 
Cauda elongata, subcylindrica.

Animal scaly; the head depressed; the nostrils placed on the side, midway between the eyes and the end of the head; the drum of the ear naked; the front teeth conical, awl-shaped (eight in the upper, and four in the lower jaw); the hinder ones largest; the side or cheek teeth compressed, short, forming a single ridge, gradually longer behind; tongue short, fleshy, with an oval smooth disk at each side of the lower part of its front part; neck rather long, furnished on each side with a large plaited frill, supported above by a crescent-shaped cartilage arising from the upper hinder part of the ear, and, in the middle, by an elongation of the side fork of the bone of the tongue; body compressed; legs rather long, especially the hinder ones; destitute of femoral pores; feet four, with five toes, the first having two, the second three, the third four, the fourth five, and the little finger and toe three joints; claws compressed, hooked; tail long, nearly round, scaly.

This genus appears to be nearly allied to the Agamae, but differs from them in the peculiar frill that is appended to the neck.