This side view of a 1.4 cm diameter individual captured near Coffin Rocks (2014) shows the mouth (pointing toward top right) with the ciliated bands near it.
Another side view of the same 1.4 cm individual clearly shows the lobes and the mouth, along with the fact that the ctene rows are of different length and only run about 2/3 down the body.
Bolinopsis infundibulum found in the Friday Harbor Marina, San Juan Island, WA by Janine Fetke July, 2009. Length approximately 2.3 cm. (Photo by: Dave Cowles, July 2009)