PLATE II. 
Fig. 
ie Scyphia tuberculata, Azzy. Twice the natural size. Humbleton Hill. 
2. = — Thrice the natural size. With indistinct indications of ex- 
current Openings on the crown of the tubercles. Dalton- 
le-Dale. 
3. Mammillopora mammillaris, A?zy. Twice natural size. Humbleton Hill. 
a. 7 —  Highly-magnified view of one of the mammille showing 
the polygonal pores. 
5. Tragos Tunstallensis, Azmg. A little enlarged. Tunstall Hill. 
6. —  Binneyi, Azmg. Four times less than the natural size. Bedford, near 
Manchester. Mr. E. W. Binney’s specimen. 
7. Bothroconis plana, Azmg. Portion (natural size) of a large specimen. Tunstall 
Hill. 
7a — —  Highly-magnified figure showing hemispherical cavities (a), 
and the supposed excurrent openings (4). 
8. Fenestella retiformis, Schlothem. Natural size. Humbleton Hill. 
8 a. — aaa — Idem. Idem. 
9. —_— —  Highly-magnified view of stems or ribs (a), showing cellule- 
apertures (4), and the dividing ridge (c) slightly tuber- 
culated: d, meshes, ¢, transverse processes. 
10. — — Figure showing the tubercles (? gemmuliferous vesicles) on 
the ridges, more developed than in the last. 
Te = — Figure showing the same structures open at the summit. 
(Through a mistake the letter / points to the cellule-apertures instead 
of the tubercles on the dividing ridges.) 
}2. = — Figure showing (?) gemmuliferous vesicles closed. 
13. aan —  Highly-magnified view of a natural zmpression of the cellu- 
liferous surface, showing impressions of the stems or ribs 
(a), cellule-apertures (4), meshes (d), and (?) gemmuliferous 
vesicles (/). (The right-hand letter ¢ should be 4.) 
14. = — Natural impression of non-celluliferous surface, showing 
impressions of the ribs, transverse processes, and meshes. 
15: = — Magnified view of casts of cellules (a) from their under or 
basal side. 
16. = —  Highly-magnified view of non-celluliferous surface of stems 
or ribs, showing foramina (@). 
17: = — Figure showing foraminated, vertical, capillary tubes form- 
ing the non-celluliferous portion of the ribs. 
18. == — Figure of a gutta-percha cast of a natural impression 
showing root-like processes. Natural size. 
19: ae — Magnified view, showing the root-like processes striking 
off from the stem. 
