20 
Stauroneis anceps amphicephala (Kiitz.) Cleve, Sv. Vet.-Akad. Handl. 
II, vol. 26, p. 148. Van Heurck, Syn. Diat. Belg., PI. 4, fig. 6. Boyer, 
Diat. Philadelphia, PL 27, fig. 7. With the type. 
Stauroneis anceps gracilis (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 
26, p. 147. Boyer, Diat. Philadelphia, PI. 27, fig. 5. Occasional with the type. 
Stauroneis baileyi Ehrenb., Mikrogeologie, PI. 6, 1, fig. 17. Wolle, 
Diat. N.A., PI. 24, fig. 27. 
Generally distributed. 
Stauroneis phoenicenteron Ehrenb., W. Smith, Syn. Brit. Diat., vol. 1, 
p. 59, PI. 19, fig. 185. Van Heurck, Syn. Diat. Belg., PL 4, fig. 2. Boyer, 
Diat. Philadelphia, PL 27, fig. 1. 
Generally distributed. 
Stauroneis phoenicenteron amphilepta (Ehrenb.) Cleve, Sv. Vet.- 
Akad. Handl. II, vol. 26, p. 149. Stauroneis amphilepta Ehrenb., Heri- 
baud, Diat. d’Auvergne, PI. 3, fig. 18. 
Digby neck. 
Stauroneis salina W. Smith, Syn. Brit. Diat., vol. 1, p. 60, Pl. 19, 
fig. 188. Boyer, Diat. Philadelphia, Pl. 27, fig. 6. 
McKay lake, Ont. 
NAVICULA Bory em. Cleve 
Navicula anglica Ralfs in Prit. Inf., p. 900. Van Heurck, Syn. Diat. 
Belg., PL 8, fig. 29. Boyer, Diat. Philadelphia, PL 26, fig. 29. 
Little River, Brora lake, N.S.; Pollet lake, Moncton, N.B.; McKay 
lake, Ont.; Prospect lake, Chilliwack (south of), B.C. 
Navicula bacilliformis Grun., Sv. Vet.-Akad. Handl., vol. 17, p. 44, 
Pl. 2, fig. 51. 
Jacquot river, Que. 
Navicula bacillum Ehrenb. Cleve, Sv. Vet.-Akad. Handl. II, vol. 
26, p. 137. Van Heurck, Syn. Diat. Belg., PL 13, fig. 8. Boyer, Diat. 
Philadelphia, Pl. 26, fig. 10. 
North river, Little River, Folly river, Earltown lake, N.S.; Prospect 
lake, B.C. 
Navicula cuspidata Kiitz., Bac., p. 94. Van Heurck, Syn. Diat. 
Belg., Pl. 12, fig. 4. Boyer, Diat. Philadelphia, Pl. 26, fig. 1. The crati- 
cular inner plates usually occur with the type. 
Generally distributed. 
Navicula cuspidata gracilis M. Perag., Diat. de Monde entier, p. 300. 
A form narrower than the type. 
Earltown lake, Robertson lake, N.S. 
Navicula dicephala W. Smith, Syn. Brit. Diat., vol. 1, p. 53, Pl. 17, fig. 
157. Van Heurck, Syn. Diat. Belg., Pl. 8, fig. 34. Boyer, Diat. Philadel- 
phia, Pl. 27, fig. 16. 
McKay lake, Ont. 
