I find Clathrulina elegans regularly, but not very often. The characteristic test with polygonal pores makes it easy to identify the species and not to confuse it. I found mostly solitary specimens on a stalk (s. fig. 3). The length of the stalk was very variable. However, the stalk was always hollow. The shape of the test is also variable. It can be spherical (s. fig. 1 a-b) or oval (s. fig. 2 a-b). The pores in the test are approximately polygonal with rounded corners. Under coverslip pressure the test breaks. It is therefore probably not purely organic. The axopodia, which protrude through the pores, are granulated and not very long (about 10–40 µm). Only rarely have I found colonies (s. fig. 4). These are formed when the biflagellated swarmer leave the test through the pores and attach themselves directly to the test of the mother cell to form a new stalk and test. When this process is repeated often, apparently branched colonies are formed.