123 



Skull of Eri/x conicus. 



Synopsis of the Species. 



I. Eyes latero-superior, separated from each other by five or more 

 longitudinal series of scales. 



A. Rostral without angular edge ; 8 to 10 keeled scales from eye 



to eye across the forehead ; tail pointed ; scales in 40 to 

 49 rows 1. conicus^ p. 124. 



B. Rostral with a sharp horizontal edge ; head-scales smooth. 



1. Tail pointed, ending in a conical scute ; 12 to 15 scales from 



eye to eye across the forehead ; scales in 47 to 53 rows. 



2. thebaicus, p. 125. 



2. Tail obtuse ; 5 to D scales from eye to eye across the fore- 



head. 



40 to 50 scales across the body ; ventrals 165- 



_ 200 3. jaculus, p. 125. 



54 to 65 scales across the middle of the body ; 



ventrals 194-210 4. joJmii, p. 127. 



36 scales across the body ; ventrals 184 .... 5. elegatis, p. 128. 



