18 
FRUSTULIA Ag. 
Frustulia rhomboides (Ehrenb.) De-Toni, Syll. Alg., vol. 2, p. 277. 
Navicula rhomboides Ehrenb., in W. Smith, Syn. Brit. Diat., vol. 1, p. 46, 
PI. 16, fig. 129. Vanheurckia rhomboides Breb., in Van Heurck, Syn. Diat. 
Belg., Pl. 17, fig. 1. Boyer, Diat. Philadelphia, PI. 17, fig. 2. 
Generally distributed. 
anomoeoneis Pfitzer 
Anomoeoneis follis (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 
27, p. 7. Navicula trochus Kiitz., Bac., p. 99, PI. 3, fig. 59?. Boyer, 
Diat. Philadelphia, PI. 17, fig. 14. 
McQuade lake, Bass River lake, Slack lake, Folly river, Little Gummel 
lake, N.S.; Desert river, Que. 
Anomoeoneis serians (Br6b.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 27, 
p. 7. Navicula serians Br4b., in Kiitz., Bac., p. 92. Van Heurck, Syn. 
Diat. Belg., Pl. 12, fig. 7. Boyer, Diat. Philadelphia, Pl. 17, fig. 12. 
Generally distributed in Nova Scotia and New Brunswick. 
Anomoeoneis serians forma minor (Grun.) Navicula serians minor 
Grun., Van Heurck, Syn. Diat. Belg., PL 12, fig. 8. Boyer, Diat. Phila- 
delphia, Pl. 17, fig. 13. Occasional with the type. 
caloneis Cleve 
Caloneis obtusa (W. Smith) Cleve, Sv. Vet.-Akad. Handl. II, vol. 26, 
p. 54. Navicula obtusa W. Smith, Syn. Brit. Diat., vol. 1, p. 50, PL 16, 
fig. 140. Navicula hebes Ralfs in Donkin, Brit. Diat., p. 23, PL 3, fig. 12 
(the only correct figure). 
Folly river, N.S. Rare. 
Caloneis silicula (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 26, 
p. 51. Navicula limosa Kiitz., in Van Heurck, PL 12, fig. 18. Boyer, 
Diat. Philadelphia, Pl. 21, fig. 3. 
Generally distributed. 
Caloneis silicula ventricosa (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, 
vol. 26, p. 52. Navicula ventricosa (Ehrenb.?) Donkin in Van Heurck, 
Syn. Diat. Belg., Pl. 12, fig. 24. 
Earltown lake, N.S. 
neidium Pfitzer 
Neidium affine (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, vol. 26, p. 68. 
Navicula amphirhynchus W. Smith. A. Schmidt, Atlas, Pl. 49, figs. 27-29. 
Generally distributed. 
Neidium amphigomphus (Ehrenb.) Cleve, Sv. Vet.-Akad. Handl. II, 
vol. 26, p. 69. Navicula dilatata Ehrenb. A. Schmidt, Atlas, PL 49, fig. 9. 
Generally distributed. 
