PLATE XLVIl. 
Goncavum-zone. 
Figs. 1 17. DUMORTIERIA GRAMMOOEROIDES, Haug. 
Fig. 1. — Side view of a small specimen, showing the almost complete spathu- 
late-shaped lateral lappet, and the length of the body-chamber from the X- 
Bradford Abbas, Dorset. From the Collection of Mr. Darell Stephens, F.G.S. 
(Page 262.) 
Fig. 2. — Top view of the mouth of this specimen, showing very short ventral 
lappet. 
Fig. 3. — Side view of a small specimen with an incomplete mouth-border of 
peculiar shape. The upper part, above the short longitudinal furrow, is test, not 
matrix as it is below. Stoford, Somerset. My Collection. 
Fig. 4. — Side view of another specimen with deeply-indented furrow in the 
stem of a, presumably, incomplete lateral lappet. Test complete. Bradford 
Abbas. My Collection. 
Fig. 5. — Top view of the same specimen. 
Fig. 6. — Side view of a small specimen with a sigmoid mouth-border devoid 
of lateral lappets. The specimen shows, a little way back in the body-chamber, a 
scar, probably due to an injury. Bradford Abbas, Dorset. My Collection. 
Fig. 7. — Top view of the end of the mouth of the same specimen, showing a 
produced blunt ventral lappet. 
Fig. 8. — Side view of an immature evolute form, with ribs not very conspicuous. 
Bradford Abbas. My Collection. 
Fig. 9. — Front view of the same specimen, which is somewhat twisted. 
Fig. 10. — Side view of an immature involute form with well-marked ribs. 
Bradford Abbas. My Collection. 
Fig. 11. — Front view of the same specimen. There is barely any trace of 
carina in the front, but on the top of the whorl, where the test is absent, a very 
small carina divides a somewhat flattened area. 
Fig. 12. — Suture-line of the same specimen. 
Fig. 13. — Side view of a specimen with peculiarly sigmoid, irregularly -reclining 
ribs. Bradford Abbas. From the Collection of Mr. Darell Stephens, F.Gr.S. 
Fig. 14. — Front view of the same specimen, showing a carina very pronounced 
for this species. 
Fig. 15. — Side view of a malformed specimen, exhibiting irregular, in some 
places bifurcate, ribs. Bradford Abbas. My Collection. 
Fig. 16. — Front view of the same specimen, showing irregular ribs and slight 
distortion ; the latter feature, however, the artist has somewhat exaggerated. 
There is, on the left edge of the ventral area> a slight ridge, probably representing 
the carina displaced. 
Fig. 17. — Portion showing rounded ventral area of the end of the whorl, 
and an attempt to reproduce the " Planicostan abdomen." 
