snail_type,number,shell_length,shell_width,aperture_length,aperture_width,central_ridgethickness,posterior_ridge_thickness,anterior_ridge_thickness,mean_ridge_thickness juncus,1,19,12.3,7.07,5.33,1.91,2.27,1.69,1.96 juncus,2,17.84,11.37,6.47,4.89,1.71,1.8,1.7,1.74 juncus,3,18.62,12.22,6.58,4.72,1.76,1.93,1.91,1.87 juncus,4,19.88,13.64,6.92,5.28,1.66,2.19,1.79,1.88 juncus,5,18.67,12.6,7.28,4.95,1.71,1.82,1.9,1.81 juncus,6,19.41,12.21,6.97,4.99,1.67,1.79,1.83,1.76 juncus,7,18.66,11.11,6.91,5.14,1.68,1.84,1.47,1.66 juncus,8,19.68,12.54,7.31,5.85,1.55,2.34,1.49,1.79 juncus,9,20.73,13.16,6.99,5.34,1.58,1.99,2.03,1.87 juncus,10,19.4,11.97,5.76,4.5,1.82,2.16,1.69,1.89 juncus,11,19.68,12.57,6.95,5.14,1.82,2.1,1.48,1.8 juncus,12,18.24,12.35,6.48,4.62,1.6,1.82,1.6,1.67 juncus,13,19.3,13.68,6.68,5.16,1.72,2.04,1.6,1.79 juncus,14,17.95,12.35,6.24,4.64,1.59,1.91,1.57,1.69 juncus,15,17.9,11.97,6.98,4.79,1.5,1.73,1.68,1.64 juncus,16,18.15,12.23,7.48,5.27,1.59,1.73,1.59,1.64 juncus,17,19.13,13.13,6.3,4.81,1.72,1.9,1.6,1.74 juncus,19,17.14,11.69,7,5.51,1.28,1.25,1.1,1.21 juncus,20,16.72,12.69,6.97,4.58,1.51,1.82,1.43,1.59 juncus,21,18.98,12.87,6.79,4.98,1.58,1.96,1.56,1.7 juncus,22,18.55,12.96,6.74,4.92,1.6,2.06,1.61,1.76 juncus,23,18.11,13.02,6.93,5.23,1.59,1.87,1.43,1.63 juncus,24,15.61,10.15,6.02,5.33,1.07,1.34,1.03,1.15 juncus,25,17.78,12.92,7.26,5.2,1.37,1.73,1.25,1.45 juncus,26,18.41,12.48,6.78,5.24,1.61,1.96,1.48,1.68 juncus,27,20.95,13.39,7.68,5.68,1.94,2.08,1.62,1.88 juncus,28,17.73,12.9,7.09,5.35,1.54,1.86,1.38,1.59 spartina,1,17.52,11.43,6.73,5.14,1.53,1.78,1.76,1.69 spartina,2,17.76,12.56,6.87,4.8,1.49,1.96,1.54,1.66 spartina,3,19.5,13.36,6.43,4.65,1.81,2.12,1.97,1.97 spartina,4,16.69,11.23,6.55,4.21,1.78,1.97,1.68,1.81 spartina,5,18.12,12.36,6.34,4.48,1.7,1.88,1.85,1.81 spartina,6,17.22,12,6.05,4.48,1.57,1.65,1.57,1.6 spartina,7,16.79,11.46,6.14,4.35,1.73,1.75,1.46,1.65 spartina,8,16.14,11.58,5.8,4.27,1.78,1.72,1.66,1.72 spartina,9,17.5,11.6,6.48,4.52,1.46,1.5,1.41,1.46 spartina,10,16.48,11.94,6.04,4.28,1.44,1.77,1.26,1.49 spartina,11,18.52,12.89,7.11,5.06,1.42,1.86,1.37,1.55 spartina,12,20.08,12.79,7.08,5.24,1.6,1.74,1.66,1.67 spartina,13,17.07,11.32,6.32,4.21,1.64,1.72,1.48,1.61 spartina,14,19.57,12.16,6.76,5,1.56,1.75,1.5,1.6 spartina,15,18.66,13.16,6.45,4.76,1.57,1.98,1.65,1.73 spartina,16,17.61,11.81,6,5.33,1.44,1.58,1.46,1.49 spartina,17,17.84,11.56,6.15,4.45,1.62,1.75,1.58,1.65 spartina,18,17.38,12.07,6.84,4.73,1.58,1.86,1.54,1.66 spartina,19,20.04,13.02,7.05,4.76,1.92,2.02,1.64,1.86 spartina,20,16.96,11.1,6.67,4.68,1.5,1.96,1.5,1.65 spartina,21,15.12,10.63,6.05,3.99,1.38,1.56,1.26,1.4 spartina,22,17.27,11.42,6.95,4.72,1.48,1.58,1.49,1.52 spartina,23,17.71,12.35,7,4.88,1.51,1.82,1.61,1.65 spartina,24,17.32,12.22,6.58,4.4,1.55,1.8,1.39,1.58 spartina,25,16.44,12.22,5.91,4.53,1.57,1.85,1.52,1.65 spartina,26,19.13,12.76,6.84,4.77,1.56,1.87,1.41,1.61 spartina,27,20.08,13.37,6.83,5.03,1.57,1.93,1.7,1.73 spartina,28,18.16,12.93,7.03,4.87,1.5,1.84,1.57,1.64