23 
Pinnularia major (Kiitz.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 27, 
p. 89. Navicula major Kiitz. Van Heurck, Syn. Diat. Belg., PL 5, fig. 4. 
A. Schmidt, Atlas, PI. 42, fig. 8. Boyer, Diat. Philadelphia, PL 28, fig. 4. 
Many variations occur. 
Generally distributed. 
Pinnularia major asymmetrica Cleve, Sv. Vet.-Akad. Handl. II, vol. 
27, p. 89, PL 1, fig. 22. 
North river, Slack lake, Earltown lake, Sydney, N.S. 
Pinnularia major transversa (A. Schmidt) Cleve, Sv. Vet.-Akad. Handl. 
II, vol. 27, p. 90. Navicula transversa A. Schmidt, Atlas, PL 43, fig. 5. 
Little River, Factory Dale, Slack lake, Folly lake, Trout lake, Clear 
lake, Earltown lake, N.S. 
Pinnularia mesolepta (Ehrenb.) W. Smith, Syn. Brit. Diat., vol. 1, 
p. 58, Pl. 19, fig. 182. 
Generally distributed. 
Pinnularia microstauron (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, 
vol. 27, p. 77. Navicula divergens minor A. Schmidt, Atlas, Pl. 44, fig. 35. 
Navicula bicapitata hybrida Grun., in Van Heurck, Syn. Diat. Belg., PL 6, fig. 9. 
Little River, Slack lake, Folly lake, Brora lake, N.S. ; Fitzgerald lake, N.B. 
Pinnularia nodosa (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 
27, p. 87. Navicula nodosa Ehrenb. A. Schmidt, Atlas, PL 45, fig. 56. 
Boyer, Diat. Philadelphia, PL 30, fig. 19. Variations in this and the two 
preceding forms occur. 
North river, Slack lake, N.S.; McKay lake, Ont. 
Pinnularia stauroptera (Grun.) Cleve, Sv. Vet.-Akad. Handl., vol. 27, 
p. 82. Boyer, Diat. Philadelphia, Pl. 30, fig. 13. 
McKay lake, Ont. 
Pinnularia streptoraphe Cleve, Sv. Vet.-Akad. Handl. II, vol. 27, p. 93. 
Navicula sp. A. Schmidt, Atlas, Pl. 42, fig. 7; Pl. 311, figs. 3, 4. In P. 
streptoraphe the margins of the valve are parallel and the strise are almost 
so, whereas in P. flexuosa the outline is somewhat elliptical and the strise 
are slightly radiate in the middle. 
North river, Folly lake, Earltown lake, Robertson lake, N.S. 
Pinnularia tabellaria Ehrenb. Cleve, Sv. Vet.-Akad. Handl. II, vol. 
27, p. 84. Navicula tabellaria A. Schmidt, Atlas, Pl. 43, fig. 4. 
Little River, N.S.; Moncton, N.B.; Prospect lake, B.C. 
Pinnularia trigonocephala Cleve, Sv. Vet.-Akad. Handl. II, vol. 27, 
p. 88, Pl. 1, fig. 21. Boyer, Diat. Philadelphia, PL 29, fig. 8. 
Mayflower P.O., Bass River lake, N.S. 
Pinnularia viridis (Nitzsch) Ehrenb., Navicula viridis (Nitzsch) 
Kiitz., Bac., p. 97. A. Schmidt, Atlas, PL 42, figs. 11, 12. Boyer, Diat. 
Philadelphia, PL 29, fig. 2. 
Generally distributed. 
