1973] 
Carmichael — A raneus 
67 
Graph II. Scatter diagram and estimated regression lines for A. mar- 
moreus measurements. Upper part of graph (open circles) shows total 
spine counts: b = 4.43, a = 16.52. Lower part of graph (closed circles) 
shows dentiform spine counts only: b=1.44, a = 8.12. Triangles show 
mean spine counts for given tibial length. 
