BY C. W. DE VIS, M.A. 



167 



is a])parent througliont their characters but nowhere more 

 plainly tluui in the similarity of their head shields. The fiftli 

 upper labial is generally, if not always the lai'gest and under the 

 orbit. The nasals are distant from one another, and the nasal 

 orifice central or in the hinder half of the shield, sharply edged 

 posteriorly, witlnjut any curvilinear grove replacing the margin. 

 The postfrontals approximate onl}': the vertical and intei'parietal 

 diifer but moderately from each other in size and shape: the 

 interoccipital is very small. The paired shields following the 

 single postmcntal are three to four, of which the first two are 

 sub-equal. The legs are moderately strong and by no means 

 far apart. The genus is not entirely confined to Australia, but 

 it would appear from Mr Macleay's discoveries, and from the 

 species represented in the Queensland IMuseum, that its chie 

 developement has been within Australian limits. 



HETEROPUS, Fitzinger. 



" JMuzzle conical : nostrils latei-al, in the middle of a nasal 

 plate: supranasal none, naso-f rental single, teeth conical, simple: 

 palate not t(jothed, with a deep triangular notch behind : 

 ears distinct, open : lower eyelid transparent : body elongate, 

 cylindrical: sides rounded: scales keeled: legs 4, far apart: toes 

 4-5 elongate, i-ather compressed, simple, clawed: hinder unequal; 

 tail conical, pointed." 



Key to the Species 

 Scales of the back. 



2 keeled — 



a. keels sharp 

 h. ,, obtuse 



3 keeled — 



a. ears without projecting scales in front 

 i bcTieath uniform ... 

 ii ,, particoloured 

 h. ears Avith three projecting scales in front 



i the upper scale largest 



ii several above small 



iii small ones all round the edge 



c. ears with o-t) projecting scales in front 



i distinctly white spotted 



ii ap})arently dark lined 



5 keeled — 



a. ears with one projecting scale in front 

 h. ears with three projecting scales in 

 front ... 



lateralis, 

 hlackmanni. 



schmeltzii. 

 pectoralis. 



ruhricatus. 



longipes. 



rostralis. 



maculatus. 

 sexdentatus. 



rhomhoidalis. 

 quinquecarina- 

 tus. 



