Clare Island Survey — Fresh-water Algae. 16 53 



Div. II. PSEUDORAPHIDIEAE. 



Tribe Synedreae. 



Synedra affinis Ktitz.— C, OB, ONE. 



var. parva Kiibz. — ONE, 31-55/* long, frequent, 

 var. fascicnlata Kiitz. — M, 57 X 5/* valve-view, 

 investiens W Sm. — CB, C; up to 50x6/* valve-view, girdle-view 5** ; 



ONE, 30/* long, 3 - 8/* broad, girdle-view, frequent, 

 barbatula Kiitz.— AS, 33x8/*. 

 Gallionii Ehrenb.-C, 176 x 10/* valve-view; AS, up to 216/* long; 



ONE, 116 x 91/*, 156 x 10/* ; K, up to 225/* long. 

 nitzschioides Grun. — C. 

 **Asterionella japonica Cleve. — CB. 



Tribe Fragilarieae. 



**Cymatosira lorenziana Grun. — CB ; ONE, 34/* long. 

 *belgica Grun. — CB, 32/1 long. 

 *Campylosira cymbelliformis (A. Schm.) Grun. — CNE, 29-37/t long. 



Tribe Raphoneideae. 

 *Raphoneis Surirella Grun. — C; 06,36-37x17^. 



Tribe Licmophoreae. 



Licmophora flabellata (Cairn.) Ag. — C ; AS, very abundant, sizes measured 

 were 97-180 long, 18/* broad girdle-view, 7/* valve-view. 



Tribe Tabellarieae. 



**Grammatophora angulosa Ehrenb. — C, AS, K. 



marina (Lyngb.) Kiitz. — C, AS ; CNE, 44/* long ; K. 

 serpentina (Balfs) Ehrenb.-C, 44-66/* long; CB, AS ; CNE, 72'5-90/* 

 long, also 47-64/* long x 9"5-10/t broad, 

 var. pusilla (Grev.) V.H.— AS. 

 Rhabdonema adriaticum Kiitz. — C, 71-93/* long, valve-view 18'5-19/u; AS, 

 85/* long ; CNE, 63-68/* long. 

 arcuatum (Ag.) Kiitz. — C, 40/* long; AS ; CNE, 33-54/* long, 

 minutum Kiitz. — C, 15-27/t broad (only 10/* sometimes) ; CNE, up to 33/* 

 broad; M; AS, 26/x broad; K. 

 **Striatella unipunctata Ag. — CB, AS. 



*delicatula (Kiitz.) Grun. — CNE, 10-13/* long. 



