406 AGAMID^. 



back : a large black spot on the anterior 



face of the thigh 5. hardivich'i, p, 408. 



Caudal spines large, longer than the inter- 

 spaces between them, subequal ; enlarged 



tubercles on the back ; 20 transverse rows 



of scales on the middle of the belly, on a 



space corresponding to the length of the 



head 6. asmussii, p. 409. 



Caudal spines large, subequal ; enlarged 



tubercles on the back-; 30 to 40 transverse 



rows of scales on the middle of the belly, 



on a space corresponding to the length of 



the head 7. loricatus, p. 409. 



1. Uromastix ornatus. 



Uromastix ornatus, Gray, Cat. p. 261. 

 Uromastix ornatus, JRilpp. Atlas N. Afr., £ept. p. 1, pi. i. ; Dttm. Sr 

 Bihr. iv. p. 538. 



Anterior border of ear not denticulated; no spines on the back 

 of the head and neck. Scales small, equal. Nine or ten femoral 

 and four pra^anal pores on each side. Tail strongly depressed, with 

 complete aunuli of large scales which are not separated by smaller 

 ones ; lateral caudal scales strongly spinose ; inferior caudal scales as 

 long as but narrower than the upper. Sand-coloured above, uniform 

 or with brown marblings or cross bands of orange brown-edged round 

 spots. 



Total length 298 miUim. 



Head 33 „ 



Width of head 29 „ 



Body 130 „ 



Fore limb 65 „ 



Hind limb 82 „ 



Tail 135 „ 



Egypt; Syria. 

 a, 6. $ & yg. Egypt. J. Burton, Esq. [P.], 



2. Uromastix acanthinurus. 



Uromastix acanthinurus, Gray, Cat. p. 262. 

 Uromastix acanthinurus, Bell, 2^ol. Joum. i. 1826, p. 467, pi. xvii. ; 



Dum. (§• Bibr. iv. p. 643 ; Guichen. E.vpl. Sc. Alg., Bept. p. 8 ; 



Strauch, JErp, Alg. p. 30. 



dispar, Rilpp. Atlas N. Afr. p. 5. 



temporalis, Valenc. C.R. Ac. Paris, xxxix. 1854, p. 89. 



Anterior border of ear denticulated. Scales small, much larger 

 than in the following species, there being about ninety on the middle 

 line of the belly, from the gular fold to the praeanal pores ; no enlarged 

 tubercles on the flanks. Nine to eleven femoral and four or five 

 pneanal pores on each side. Tail strongly depressed, above with 



