(18a) 



Table IV. 

 loefficients of correlation for lir.es 9, 41 

 and 43. 

 Line 9. 



Character , 



Spine number 

 Shell size. 

 Shell form. 

 Mouth size. 

 Mouth form . 



Parental correlation 

 (93 ind.) 



.148 ± .069 



-.li^l ± .069 



-.135 ± .069 



-.071 ± .069 



-.053 ± .070 



Grandpar . correlation 

 (81 ind.) 



.041 i .075 



-.060 i .075 



.120 i .074 



-.155 t .073 



-.252 £ .070 



Character . 



Spine number 

 Shell size. 

 Shell form. 

 Mouth size. 

 Mouth form. 



Line 41. 



Parental correlation. Grandpar. correlation 

 (130 ind.) (116 ind.) 



.006 ± .060 



-.062 t .060 



-.057 t .060 



-.017 ± .060 



.185 ± .058 



.125 i .060 



-.074 i .063 



.152 i .062 



.117 i .059 



-.061 i .060 



Character , 



Spine number 

 Shell size. 

 Shell form. 

 Mouth size. 

 Mouth form. 



Line 43. 



Parental correlation 

 (81 ind.) 



.144 ± .073 



.088 i .075 



-.082 i .075 



-.148 ± .074 



-.080 ± .075 



Grandpar. correlation 

 (69 ind.) 



.215 t .073 



-.019 t .080 



-.053 i .080 



.117 t .079 



.240 ± .075 



