lANTUSlID-M. 325 



•with round dark browu spots ; a dark brown temporal streak ; tail 

 with four longitudinal darli brown streaks ; lower surfaces pale 

 yellow, the throat dotted with brown. 



millim. millim. 



Total length 11J8 Fore limb 25 



Head 18 Hind limb 33 



Neck 17 Tail 107 



Body 56 



N.W. Australia. 



a. Yg. Champion Bay. Mr. Dubuulay [(/.]. 



Fam. 13. XANTUSIID^. 



Xautusiidee, Baird, Pruc. Ac. Phllad. lii^yS, p. 254. 



Lacertida^, part., Cope, Proc. Ac. Philud. 1804. 



Tracliydermi aglvphodouta, part., Bucourt, Miss. 6b. Mex., Rept. 



1878. 

 Lepidopliymieus, Sumichrast, Bull. Soc. Zool. France, 1880, p. 178. 

 Xautusiidfe, Cope, Proc. Ac. Philad. 188."?, p. 30. 

 Xantusiidoe, Boulcnc/er, Ann. 8)- Mag. N. H. (5) xiv. 1884. 

 Lepidophymidte, Gunthcr, Biol. C.-Avi., Rept. 1885. 



Tongue short, scarcely extensible, indistinctly nicked anteriorly, 

 with oblique overlapping plicae converging towards the median line, 

 and scale-like imbricate papillae on the distal extremity. Dentition 

 strictly pleurodont ; teeth numerous, the laterals with obtusely tri- 

 cuspid crowns. Palate toothless, with a large dermal flap overlap- 

 ping its fellow on the other side. Postorbital and frontosquamosal 

 arches bony, strong, the supratemporal fossa roofed over by the 

 cranial bones ; praemaxillary single ; nasals, frontals, and parietals 

 two ; palatines in contact with each other anteriorly, and with the 

 maxillary and os transversum, there being no infraorbital fossa. 

 Limbs well developed. Clavicle dilated, loop-shaped proximally ; 

 interclavicle "^-shaped ; sternum without fontanelle. No abdominal 

 ribs. Head covered with symmetrical shields, without dermal ossi- 

 fications. Body granuhir or tubercular above, plated inferiorly. No 

 moveable eyelids ; pupil vertically elongate. Ear exposed. Femoral 

 pores. 



Synopsis of the Genera. 



Dorsal lepidosis heterogeneous ; no supraoculars ; two frontals, form- 

 ing a longitudinal suture between the praefrontal and tlie inter- 

 parietal 1. Lepidophyma, p. 326. 



