TAB. Wa 
CORALS FROM THE LONDON CLAY. 
LirHaR&#A WepsTERI (p. 38). 
Fig. 1. A mass of this compound corallum adhering to the surface of a pebble; 
natural size. 
la. Calicular surface, magnified. 
14. Vertical section of two corallites, magnified to show their internal structure. 
lc. A transverse section made at a considerable distance below the calice, and 
magnified so as to show the structure of the columella, the septa, and the 
walls. 
HoLaRM#A PARISIENSIS (p. 40). 
Fig. 2. A fragment of this cylindroid compound corallum magnified ; the length of the 
line placed below indicates its real diameter. 
2a. Transverse section of the compound corallum, showing the vertical section of 
the corallites, magnified. 
MopsEa costata (p. 42). 
Fig. 3. A large specimen ; natural size. 
3a. A fragment, magnified. 
GRAPHULARIA WETHERELLI (p. 41). 
Fig. 4. Fragments of the quadrangular portion of the sclerobasis ; natural size. 
4a. A fragment of the cylindrical portion of the same. 
46, 4c. Fragments of both forms, magnified. 
4d, 4e. Transverse sections of the same magnified, so as to show their radiate 
structure. 
WEBSTERIA CRISIOIDES (p. 43). 
Fig. 5. Fragment of a branch ; natural size. : 
5a. Portion of the same, magnified. 
