, 
1907] Terry,— Partial List of Connecticut Diatoms 137 
Surirella striatula 'Turp. Frequent, locally abundant. 
x " — var. friplicata Grun. Occasional. 
gemma Ehrenb. Frequent. 
cardinalis Kitt. Rather rare; abundant in Bristol. 
ovalis Bréb. Occasional. 
s "  var.angusta (Kütz.)VH. (S.angusta Kütz.) Occasional. 
jastuosa Ehrenb. Frequent. 
" " — var. lata (W. Sm.) VH. Frequent. 
recedens A. Schm. Occasional. 
Moelleriana Grun. Occasional. 
gracilis A. Schm. Occasional. 
Febigerti Lewis. Frequent. 
constricta Ehrenb. Rare, Killingsworth. 
" — *Terryi Ward. Rare, except in Bristol, New Britain and 
Leete's Island. 
C ymatopleura elliptica (Bréb.) W. Sm. Rare, New Britain. 
solea (Bréb.) W. Sm. Occasional. 
hibernica W. Sm. Rare. 
marina Lewis. Rare, Clinton. 
Podocystis adriatica Kütz. (P. americana Bail.) Rare. 
Campylodiscus echineis Ehrenb. Common. 
hibernicus Ehrenb. Frequent. 
Diatoma vulgare Bory. Frequent. 
elongatum var. tenue (Ag.) VH. (D. tenue Ag.) Frequent. 
di hiemale (Lyngb.) Heib. | (Odontidium hiemale IKütz.) Lo- 
cally abundant. | 
anceps (Ehrenb.) Kirchn. Frequent. 
Odontidium mutabile W. Sm. Locally abundant. 
Harrisonii W. Sm. (Fragilaria Harrisonii Grun.) 
Rare and local, Bristol. 
Meridion circulare (Grev.) Ag. Frequent. 
“ intermedium H. L. Sm. Frequent. 
Synedra pulchella (Ralfs) Kütz. Occasional. 
var. Smithii (Ralfs) VH. Occasional. 
ulna var. danica (Kütz.) VH. (S. danica Kütz.) Frequent. 
afinis Kütz. Frequent. 
Ardissonia superba (Kütz.) Grun. (Synedra superba Kütz.) Occa- 
sional, Leete’s Island. 
Asterionella formosa Hass. Abundant in water supply. 
S Raljsti W. Sm. Abundant in water supply. 
Fragilaria virescens Ralfs. Common. 
i capucina Desmaz. Common. 
construens (Ehrenb.) Grun. Common. 
Raphoneis amphiceros Ehrenb. | Frequent. 
a belgica Grun. Rare, Leete's Island. 
" " var. intermedia Grun. Occasional. 
gemmifera Ehrenb. Frequent. 
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