102 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



smooth plates of various sizes occupy the whole side of the head 

 from the muzzle to the ear, and beneath the ear on the swollen 

 part of the head are three rows — 4, 3, 2, — of large white, smooth 

 plates ; beneath the lower labial shields are also two or three 

 series of smooth but small plates ; gular pouch large, longitudi- 

 nally folded, attached to the breast between the fore legs, and 

 covered with small keeled scales becoming smaller behind ; a 

 crest of high, obtusely-pointed, very compressed scales sloping 

 backwards, but not arcuated, extends from the back of the head 

 to the first-fifth of the tail with a short break over the fore legs ; 

 a slight skinny ridge extends from the front of the shoulder 

 along the side to near the hind legs ; scales all keeled, those near 

 the back square and pointing upwards and backwards, those on 

 the sides pointing backwards, those on the belly larger, more 

 acutely keeled and converging towards the centre, those on the 

 legs like the belly, on the soles of the feet small, and on the tail 

 largest, the keels forming longitudinal angular ridges ; legs long 

 and moderately robust ; general form very compressed, especially 

 towards the back ; tail very long, taper, and moderately com- 

 pressed ; colour of the head, dark brown above with a few white 

 scales of rather larger size than the others, and whitish on the 

 sides and underneath with a few dark lines under the chin, and 

 with the back part of the pouch reddish brown ; back and sides 

 of the body whitish yellow, marked with patches of black scales, 

 a portion of the sides behind the shoulder being much darker ; 

 under surface dingy yellow ; a broad, curved, whitish patch 

 extends from the head behind the ear to the shoulder ; the tail is 

 more or less distinctly marked throughout by imperfect, broad, 

 brown rings. 



Total length, 2 feet 6 inches, of which the tail occupies 1 foot 

 9 inches. 



One specimen was taken at Hall Sound. 



This species differs from Tiaris meyapogon (Lopliyrus dilophus 

 of Dura, and Bibr.) which is also from New Guinea, in many 

 important particulars, judging from Dumeril and Bibron's 

 description and plate. 



