Figure 3. Species that occur exclusively in reef/lagoonal settings. SLM photograph magnifications are indicated for each image and the scale is given as longest dimension (LD) in millimeters (mm) so that the illustrated object is, for example, 0.78 mm in its longest real dimension (Figure 2.1). 

3.17, 3.18. Planispirinoides bucculentus (Brady); 45x; 17, two chamber side, LD=.44mm; 18, three chamber side, LD=.44mm.