PLATE XCII. 
Concavum-zone. 
Figs. 1—4.—Sonninta tocupies, S. Buckman. 
Fig. 1.—Side view of the type-specimen, with the greater portion of the test 
preserved. Reduced to two-thirds of natural size. (To complete the central part 
of the umbilicus some details have been taken from the other side.) Bradford 
Abbas. My Collection. 
Fig. 2.—Outline of the whor]-section and part of the embraced whorl, natural 
size. 
Fig. 3.—Portions of two septa of the same specimen (at radius of 100 mm.) 
showing the extraordinarily long lobes, and a superior lateral lobe with an 
intra-axial, anisosceloid terminal lobule. 
Fig. 4.—Portions of two septa from an immature specimen (at radius of 
70 mm.), differing from fig. 3 in having the outer lobule distinctly bipartite. 
This figure, which shows the approximation of the septa, is for comparison 
with fig. 2, Pl. LVII, a re-drawing of which, with additional details, is given in 
Tels CTU are en 
Figs. 5—7.—Sonnin1a Locutosa, 8S. Buckman. 
Fig. 5.—Portion of the side view; the central whorls are wanting, and the 
specimen is poorly preserved generally. Natural size. Bradford Abbas, Dorset. 
My Collection. 
Fig. 6.—Outline of the whorl-section and of part of the embraced whorl. 
Natural size. 
Fig. 7.—Portions of two septa showing very long lobes, the superior lateral 
lobe with a very long, slightly intra-axial, but isosceloid terminal lobule; the 
outer lobule bipartite. 
