1) Order volvocales 2) Protoctist order 
In taxonomy, the Volvocales, also known as Chlamydomonadales, are an order of flagellate or pseudociliate green algae, specifically of the Chlorophyceae. Volvocales can form planar or spherical colonies. These vary from Gonium (4 to 32 cells) up to Volvox (500 cells or more). Each cell has two flagella, and is similar in appearance to Chlamydomona...
[n] - chiefly freshwater green algae
order Volvocales noun chiefly freshwater green algae; solitary or colonial