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TABLE 11-27 <br />Species List and Relative Abundance of Algae in <br />Periphyton Samples From the Drainage Below Drill Hole 220 <br />in Section 26, May 1974 <br />Relative Abundance <br />Taxa (@) <br />CHLOROPHYTA (Green algae) <br />Vaucheria sp. Trace <br />BACILLARIOPHYCEAE (Diatoms) <br />Meridion circ ulare 63.3 <br />Fragilaria virescens 18.0 <br />Achnanthes exi9ua 2.5 <br />Navicula viridula 1.6 <br />Comphonema lanceolatum 1.4 <br />Navicula rhynchocephala 1.4 <br />Comphonema pa rv ul um 1.2 <br />Eunotia incisa 0.9 <br />Eunotia pectinalis 0.7 <br />Navicula exigua 0.7 <br />Suri rella ap tel la 0.7 <br />5 ny edra ulna 0.7 <br />S urirella angustata 0.5 <br />Am hora ovalis 0.2 <br />Navicula cryptocephala 0.2 <br />N. u ula 0.2 <br />Pinnularia spp. 0.2 <br />Synedra pul chella 0.2 <br />Unidentified diatoms 4.8 <br /> <br />• <br />• <br />