Fig. 42b—Navicula grevillei. Fig. 43a—N. lyra; 43b-e—v. eilliptica. Fig. 44a, b—N. subcarinata.. Fig. 45—N. peregiina. Fig. 46—N. gracilis. Fig. 48—N. americana. Fig. 49—N. jorcipata. Fig. 50—N. yarrensis.. Fig. 51—N. cuspidata. Fig. 52—N. climentis. Fig. 54a—N. gianulata. 54b—N. gianulatabrasilunsis intergrade.
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