TAB. IV. 
CORALS FROM THE LONDON CLAY. 
PARACYATHUS CRASSUS (p. 23). 
Fig. 1. Two adult corals and a young one, cemented together by their basis; 
natural size. 
la. A young specimen, with its basis spreading very much, viewed from above. 
14. A young specimen, magnified to show the structure of the coste. 
le. Calice, magnified ;—1,1,1,1,1,1, Septa of the first cyclum. 
PARACYATHUS CARYOPHYLLUS (p. 24). 
Fig. 2. An adult specimen, complete; natural size. 
2a, 26, 2c. Worn specimens ; natural size. 
2d. Two young individuals cemented by their basis. 
2e. A remarkably short specimen. 
2 7. A complete specimen, magnified so as to show the structure of the wall. 
2g. Calice, magnified. 
PARACYATHUS BREVIS (p. 25). 
Fig. 3. A specimen, the base of which is somewhat worn down ; natural size. 
3a. The same, magnified. 
30. Calice, magnified. 
3c. Interior cast of a corallum, which is taller than the preceding one, but appears 
to belong to the same species. 
Dasmia SowErsyI (p. 25). 
Fig. 4. Side view of the corallum ; natural size. 
4a. The same magnified, so as to show the structure of the coste. 
4 6. Calice, magnified; the central part is filled up with extraneous matter. 
