(calos, beautiful)
Valve convex, linear or lanceolate in general outline, with transverse, smooth or finely punctate striæ crossed by one or more longitudinal lines.
Endochrome of two chromatophores lying one on each valve, entire in some species and deeply cleft in others.
CALONEIS LIBER (WM. SM.) CL.
Valve linear, with parallel margins and rounded ends; axial area narrow, central area orbicular; striæ transverse in the middle, slightly divergent at the ends, 16 in 10 µ; terminal fissures slightly curved in the same direction; longitudinal line median. L. 82 µ.
Atlantic coast, chiefly southward.
Pl. [40], Fig. 1.
CALONEIS SILICULA (EHR.) CL.
Valve linear, gibbous in the middle, with broad sub-cuneate ends; axial area narrow, central area rounded; longitudinal line marginal; striæ parallel or nearly so, 16 to 18 in 10 µ.
Navicula silicula Ehr.