Lagena semistriata Williamson, 1848

Figure 2.17

1848 Lagena striata (Montagu) var. semistriata Williamson, p. 14, pl. 1, figs. 9-10.

1994 Lagena semistriata Williamson; Jones, p. 64, pl. 57, figs. 14, 16.

Description. Test pear-shaped with a flat base, wall calcareous, finely perforate, surface smooth except for the striations in the basal half of the test; single chambered; aperture terminal at the end of a long, striated neck.