Vol. VIII] 



VAN DE.XBURGH AND SLEVIN— GARTER-SNAKES 



211 



Figure 3 



Figure 3 shows the counts of the infralabial plates. It 

 again emphasizes the distinctness of T. o. ordinoidcs, and 

 also shows the strong tendency in T. o. conch ii to increase 

 to 11 the number of these plates. The percentages shown for 

 the various subspecies are : 



T. 0. ordinoidcs 1, 3. 5, 55, 15, 19, 2. 



T. 0. atratus 1, 2, 10, 14, 7?), 1. 



T. 0. elcgans (Sierra Nevada) 5, 17, 74, 0.4. 



T. 0. elcgans (San Bernardino Mts.) 10, 90. 



T. o. vagrans 3, 6, 84, 5, 2. 



T. 0. biscutatus 3, 5, 91, 1. 



T. 0. hammondii 3, 4, 92, 1. 



T. 0. couchii 7.5, 56, 7.5, 25. 



