17 
Gomphonema intricatum Kiitz., Bac., p. 87. Van Heurck, Syn. Diat. 
Belg., PI. 24, fig. 30. A. Schmidt, Atlas, PI. 236, fig. 5. Boyer, Diat. 
Philadelphia, PI. 19, fig. 14. 
McKay lake, Ont.; Pukaist creek, B.C. 
Gomphonema lanceolatum Ehrenb. ( Gomphonema affine Ktitz.) Van 
Heurck, Syn. Diat. Belg., PL 24, fig. 8. 
Little river, N.S.; Pollet lake, N.B.; McKay lake, Ont.; Cobble Hill, 
Chilliwack (south of), B.C. 
Gomphonema martini Fricke, in A, Schmidt, Atlas, PL 238, figs. 23-25. 
Bass Kiver lake, Folly lake, N.S. 
Gomphonema puiggarianum aequatoriale Cleve, Sv. Vet.-Akad. Handl. 
II, vol. 26, p. 189. A. Schmidt, Atlas, PL 233, fig. 32. Chilliwack (south 
of), Blackwater river, B.C. 
Gomphonema sarcophagus Greg., Quart. Jour. Micr. Sc., vol. 4, p. 13, 
Pl. 1, fig. 42. Van Heurck, Syn. Diat. Belg., Pl. 25, fig. 2. Boyer, Diat. 
Philadelphia, PL 19, fig. 16. 
Earltown lake, N.S. 
Gomphonema sphaerophorum Ehrenb. Van Heurck, Syn. Diat. Belg., 
PL 23, fig. 30. Boyer, Diat. Philadelphia, PL 19, fig. 9. 
McKay lake, Ont. 
Gomphonema subclavatum Grun., Van Heurck, Syn. Diat. Belg., 
PL 24, fig. 1. 
Desert river, Que. This form is quite variable. 
Gomphonema subtile Ehrenb. Greg., Quart. Jour. Micr. Sc., vol. 4, 
Pl. 1, fig. 12. Van Heurck, Syn. Diat. Belg., Pl. 23, figs. 13, 14. A. 
Schmidt, Atlas, PL 236, fig. 10. 
Nova Scotia deposits. 
Gomphonema subtile sagitta (Schum.) Cleve, Sv. Vet.-Akad. Handl. 
II, vol. 26, p. 182. Van Heurck, Syn. Diat. Belg., PL 23, fig. 27. A. 
Schmidt, Atlas, PL 236, figs. 12-14. 
Earltown lake, Slack lake, Folly lake, N.S. 
gyrosigma Hassall 
Gyrosigma attenuatum (Kiitz.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 
26, p. 115. (Pleurosigma attenuatum W. Smith, Syn. Brit. Diat., vol. 1, 
PL 22, fig. 216) Van Heurck, Syn. Diat. Belg., Pl. 21, fig. 11. 
Brora lake, N.S.; Moncton, Pollet lake, N.B.; McKay lake, Ont. 
Gyrosigma kutzingii (Grun.) Cleve. Pleurosigma kutzingii Grun. in 
Van Heurck, Syn. Diat. Belg., PL 21, fig. 14. Boyer, Diat. Philadelphia, 
PL 38, fig. 12. 
McKay lake, Ont. 
