1901.] 



BATBACHIASrS PEOM ARABIA. 



143 



Peters's definition of the genus is as follows : — " Dentes maxil- 

 larum tomiis innati. Caput siiperne scutis duobus, rostrali fronto- 

 parietalique, obtectum. Oculi distineti, superolaterales. Corpus 

 subbreA' e ; segmenta lateralia quadrangularia, dorsalia ventraliaqne 

 media minora, squamiformia ; sulcus lateralis nullus, spinalis 

 obsoletus,abdominalis medianus distinctus ; pori prseanales distineti. 

 Cauda compressa, apice acuminato." In his further explanation 

 of the generic characters he states that the nasal was sickle-formed, 

 and in his account of the specific characters he states that there 

 were three upper labials, but that in the type the first upper 

 labial had united with the nasal, separating only two labials, the 

 nasal entering the labial border, there, however, being in reality 



3 upper labials. 



Mocquard, who had 9 examples of A. anguliceps Peters under 

 observation, viz., 7 males and 2 females, states that they all had 



4 upper labials instead of 3 as described by Peters, so that in 

 A, angulieeps these shields may vary from 2 to 4, the smaller of 

 these numbers being due to the first labial amalgamating with the 

 nasal. Pour, however, would appear to be the prevalent number 

 in this species. 



In the specimen 88.1.12.1 there are two well-developed and 

 prominent preanal pores, whereas in the individual 89.12.16.32 

 there are four small blackish orifices in the position of pores 

 exactly as figured by Peters. If these pores are confined to the 

 males, then the specimen 96.9.24.16 and the type of A. arabicus 

 are females. 



[This burrowing reptile I obtained at Ai Khaur from a ploughed 

 field, it being thrown out by the plough just as I passed. It was 

 salmon-pink in colour when alive. — A.B.P.^ 



Lacertid^. 

 11. AcANTHODACTYLUs cajsttoris Grunther. 





02 



CD 

 > 



o 

 o 





o 



S 

 > 



o 

 02 



Femoral pores. 



1 



juv. $ 



$ 



juv. 2 



2 



621 



60 



39 



53 



36 



46 



152 



? 



9 

 ? 

 ? 



107 



32 



34 

 39 

 32 

 34 

 39 



14 

 14 

 13 

 14 

 14 

 14 



11 



14 

 13 

 12 

 12 

 10 



L. E. 



20 21 



21 20 



22 22 

 21 20 

 21 20 

 17 20 



2 



3 



4 



5 



6 



1 Measurements throughout in millimetres. 



