Fig 
12 
13. 
14. 
15. 
16. 
18. 
PLATE V. 
_ Thamniscus dubius, Schlotheim. Portion of a branch, highly magnified, showing 
the mucro or denticle-like process (e) on the proximal 
lip of the cellule-apertures. Tunstall Hill. 
Acanthocladia anceps, Schlothem. Figure a little enlarged. Humbleton Hill. 
Twice the natural size. Humbleton Hill. 
Magnified view, showing the cellule apertures. The surface 
of the specimens is rather abraded. Humbleton 
Hill. 
Non-celluliferous surface. The dotted portions are im- 
pressions of the celluliferous surface, the coral being 
removed. Humbleton Hill. 
Highly-magnified view of a natural impression of the cel- 
luliferous surface of a stem, exhibitmg impressions of 
the cellule-apertures (@), (7) gemmuliferous vesicles (4), 
and foramina. Humbleton Hill. 
Transverse section (highly magnified) of a branch, showing 
casts of the cellules (a), and a vacancy left by the 
removal of the basal plate (2). Humbleton Hill. 
