MASTOGLOIA ELEGANS LEWIS
Valve lanceolate, acute; loculi indistinct or rudimentary, extending to the ends; central area apparently quadrate, sometimes indistinct; puncta distinct, 15 in 10 µ, in transverse and longitudinal rows.
Along the coast. Common.
Pl. [17], Fig. 20.
MASTOGLOIA APICULATA WM. SM.
Valve elliptical-lanceolate, sometimes with slightly produced apices; median line between two ribs; central space very small; loculi numerous; puncta in slightly radiating rows and in longitudinal lines.
Along the coast.
Pl. [17], Figs. 21, 22, 23.
MASTOGLOIA ANGULATA LEWIS
Valve elliptical, with produced apices; loculi usually less than 12, unequal, the larger in the middle; striæ, 12 in 10 µ, puncta in decussating rows. "Differs from apiculata in its more broadly elliptical shape, the smaller number of its loculi and the angular character of its striation" (Lewis).