RESULTS
Size of Euglena acus cells
The range of size of specimens from the system of treatment ponds at Mangere was 115-180 x 7-17 t~m (Haughey, 1968). Most of these cells (Figs. 1A, 1O, 1E, 1F) were therefore slightly longer and markedly broader than the typical E. acus
described by Pringsheim (1956). Representative cells from the Papakura sludge lagoons measured in 1965 and 1967 covered the range 133-147 x 11-13/zm but several cells from these lagoons measured during 1964 were narrower, being 115 x 7/~m, 130 x 7/~m and 135 x 8/~m respectively. A disused Pasveer ditch alongside these lagoons yielded specimens in 1967 that were 151 x 12.5 /zm, 158 x 9.8 t~m and 220 x 8 /zm. The few cells that were seen in samples from rainwater pools were thinner (Fig. 1B), being about 150 x 9 tzm.
RESULTS Size of Euglena acus cells The range of size of specimens from the system of treatment ponds at Mangere was 115-180 x 7-17 t~m (Haughey, 1968). Most of these cells (Figs. 1A, 1O, 1E, 1F) were therefore slightly longer and markedly broader than the typical E. acus described by Pringsheim (1956). Representative cells from the Papakura sludge lagoons measured in 1965 and 1967 covered the range 133-147 x 11-13/zm but several cells from these lagoons measured during 1964 were narrower, being 115 x 7/~m, 130 x 7/~m and 135 x 8/~m respectively. A disused Pasveer ditch alongside these lagoons yielded specimens in 1967 that were 151 x 12.5 /zm, 158 x 9.8 t~m and 220 x 8 /zm. The few cells that were seen in samples from rainwater pools were thinner (Fig. 1B), being about 150 x 9 tzm.
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