PLATE LXXXII. 
Concavum-zone. 
Figs. 1, 2.—Sonninia orassa, S. Buckman. 
Fig. 1.—Side view of an adult specimen reduced to two-thirds the natural size. 
About one-third of whorl is body-chamber. (For this figure it has been necessary 
to take details from both sides of the specimen.) Bradford Abbas. My 
Collection. (Page 350.) 
Fig. 2.—Restored outline of the whorl-section; with test. Natural size. 
Figs. 3, 4.—Sonninia Nuva, S. Buckman. 
Fig. 3.—Portion of the side-view. Bradford Abbas. From my father’s 
Collection. (Page 352.) 
Fig. 4.—Restored outline of whorl-section with test, showing outward-shelving 
whorls. 
Figs. 5, 6.—Sonninia tavicata, S. Buckman. 
Fig. 5.—Portion of side view showing deficiency of central spines. Bradford 
Abbas. My Collection. (Page 356.) 
Fig. 6.—Restored outline of the whorl-section, with test. 
