PLATE V. 
Fig. 1, A madreporite resembling the fossil madrepore of Helwing, Fought, Volkmanii, 
and others, which has been named Madrepora Ananas. At a, is shewn the 
mode in which, as in proliferous flowers, the newly-formed parts proceed from 
the centre of each existing disk. At 6, is represented the mode of growth in 
the Madrepora Stellaris, 
2. The madreporite from Gothland, known as Madrepora Truncata. At c, is shewn 
the proliferous mode in which the new joints arise from the surfaces of the al- 
ready formed stars. 
3. A polished transverse section of the Lithostrotion of Lhwydd, from Wales. 
4. A fossil stellated madrepore, from Lincolnshire. 
5. A madreporite, from Steeple Ashton. 
6. The lithostrotion, or basaltiform madreporite, the transverse section of which is 
shewn. Fig. 3. 
7. The spider-stone, or Arachneolithus, of Bruckman. 
8. A stellated madreporite, from Ribieze, in Transylvania. 
9. A madreporite, bearing somewhat of a honeycomb appearance, from Masbury, 
near Mendip. 
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