black and white portrait

描述：

Notosolenus (note-owe-so-lean-us) similis Skuja, 1939. Cell outline is oblong. Cells are 10 to 22 microns long (mostly 12 to 17 microns), 6 to 12 microns wide, and flattened. The cells are usually with a narrowed anterior end and a rounded posterior end. The right half of the cell is thicker than the left half. The organism has a dorsal groove in the left-hand side of the cell with a well developed undulating ridge and may or not have a shallow median ventral groove. The two flagella are unequal in length, the anterior flagellum is about 1.0 to 1.7 times cell length and the recurrent posterior flagellum is about 0.3 to 0.5 times cell length. The reservoir lies in the right side of the cell, is usually roundish and the nucleus is in the left side. The cells glide with the anterior flagellum in contact with the substrate. Common, especially after cover slips have been in place for several days.