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REFERENCES

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    Cooke, M. C. British Fresh-water Algae, 1, 171; 2, PL 65, fig.2. 18821884.
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    De Toni, J. B. Sylloge Algarum, 1, 81. 1889.
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    Hassall, A. H. Observations on a new group, genus, and subgenus, of freshwater Confervae, with descriptions of species mostly new. Ann. Mag. Nat. Hist. 10, 388389. 1842.
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    Hassall, A. H. A History of the British Freshwater Algae, 1, 195196; 2, Pl. 50, figs. 1, 2. 1845.
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    Hirn, K. E. Monographie und Iconographie der Oedogoniaceen, pp. 289290, P1. 10, fig. 56. 1900.
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    Wittrock, V. B. Prodromus Monographiae Oedogoniearum, p. 42. 1874.
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    Wolle, F. Fresh-water Algae of the United States, 1, 9394; 2, P1. 78, fig. 3. 1887.