278 PHILOSOPHY OF ZOOLOGY. 



28. LOPHURUS. Crest continued along the tail, giving 

 it a compressed form. 



Back destitute of a crest. The head is enlarged behind 

 by the maxillary muscles. 



29. AGAMA. Scales on different parts of the body spin- 

 ous. Lacerta muricata. 



30. TRAPELUS. Scales smooth and without spines. T. 

 JEgyptiacus. 



(b.) Body and tail nearly of the same thickness through- 

 out. Feet imperfectly [developed, and scarcely fitted for walk- 

 ing or aiding the animal in progressive motion. In general 

 appearance, the species resemble serpents. Scincusidce. 



31. SCINCUS. Scales regularly imbricated. The genus 

 Seps of DAUDIN differs chiefly in the superior length of 

 the body, and the hind legs being more remote from those 

 in front. 



32. CHALCIDES. Scales square and formed into rings. 

 There are several species easily distinguished by the num- 

 ber of the toes on the feet. 



B. Furnished with two feet. 



The animals of this group resemble the Scincusidae in 

 their lengthened form and imperfect feet, and, by wanting 

 one pair, make a still nearer approach to the serpents. 



33. BIPES. Fore-feet wanting. Underneath the skin 

 the rudiments of scapular and clavicular bones may be 

 detected. The species of this genus may admit of still far- 

 ther division from the condition of the toes. 



34. CHIROTES. Hind-feet wanting. Lacerta lumbri- 



