18, 18a. 
18 4. 
18 ¢. 
TAB. XLI. 
Amberleya capitanea, Go/df., sp. Forest Marble (page 95). 
Natica Hulliana, Zyc. Great Oolite (page 13). 
Amberleya nodosa. See also Part I, Tab. V, fig. 19. 
Acteonina oliveformis. Great Oolite and Forest Marble. See also Part I, 
Tab. VIII, fig. 14, and fig. 12*. 
55 A specimen of more advanced growth, with the spire 
more produced. 
» Kirklingtonensis, Zyc. Great Oolite (page 26). 
» brevis, Zyc. See also Cylindritis? brevis, Part I, Tab. VIII, 
fig. 13, page 26. 
Nerita Buvignieri. Examples of two stages of growth. See also Stomatca 
Buvignieri, Part I, Tab. IX, fig. 32. The specimens 
now figured are from the Forest Marble of Laycock. 
Ammonites discus, Sow. Forest Marble. Slightly reduced (page 4). 
Rissoina subulata, Zyc. Great Oolite. Enlarged (page 98). 
Amberleya monilifera, Zyc. Forest Marble. Enlarged (page 95). 
Cerithium costigerum, Pvefte. Variety with flattened volutions and oblique 
cost (page 92). 
+ AS A portion of the surface enlarged. 
- Pe Specimen with shorter, more inflated volutions, 
and perpendicular coste. 
a is A portion of the surface enlarged. 
Kilvertia pulchra, Zyc. Great Oolite and Forest Marble. For the form of the 
aperture see Tab. XLIV, fig. 4, pages 10 and 94. 
Ph or A portion of the surface enlarged. 
Alaria myurus, Des/. See also Alaria levigata, Part I, 'Tab. III, fig. 3. 
Amberleya tricincta, Zyc. Forest Marble (page 96). 
Turbo subtexatus, Zyc. Forest Marble. 
Cerithium? Waltoni, Zyc. Forest Marble (page 92). 
~ hemicinctum, Zyc. Forest Marble. Enlarged (page 91). 
Acteonina Luidii, Wor. An adult specimen, with the spire moderately elevated. 
Forest Marble. See also Tab. XXXI, fig. 16, 
page 27. 
; +5 A specimen with the spire elevated. 
u =D Specimen with the spire elevated and the last whorl 
unusually lengthened. 
