4 Proceedings of the Boyal Physical Society, 



tabular form, instead of recording each specimen separately, 

 as of course I did in the notes from which these tables are 

 compiled. I shall deal with the head shields afterwards. 



Scaling Variations in Vipera bents. 



Explanation of Terms and Signs in the Tables. 



" m " means millimetres. 

 " Labials " means the upper Labial scales. 

 " Gastrosteges " means the Ventral scales. 

 " Urosteges " means the Sub-caudal scales. 

 " & a " means " in addition to the ' anal ' scale." 

 " & t " means " in addition to the ' terminal ' scale." 

 " K " means the right side. 

 " L " means the left side. 



" Eows " means the number of rows of scales across the 

 middle of the body. 



JVote. — The measurements given in inches are the some- 

 what rough measurements noted on arrival of specimen by 

 tape measure. The measurements in millimetres are the 

 exact measurement, done with great care by a metric measure. 

 It is useful to have both given. 



