FOSSIL FAUNA. 93 



PLATE XXXVII. 



Various Fossil Compound Corals. 



Fig. 1. A beautiful specimen of Star-coral {Astrea ananas, of Goldfuss), from the Silurian strata 

 of Sweden. At a, is shown " the mode in which, as in proliferous flowers, new 

 polypes bud from the centre of the parent disk. At b, is represented the growth 

 in the recent Madrepora stellaris of Linnaeus." — Mr. Parkinson. 



Fig. 2. An elegant Cyathophyllum (C. dianthus, of Goldfuss), from the Silurian formation of 

 Sweden. At c, (the lower part of the plate,) is shown its probable mode of increase. 



Figs. 3 & 6. A columnar compound coral {Lithostrotion striatum, of Lhwyd), from the moun- 

 tain limestone of Derbyshire ; fig. 3, is a transverse section of fig. 6, showing the 

 basaltiform arrangement of the columns. 



Fig. 4. " A fossil madrepore, from Lincolnshire." — Mr. Parkinson. 



Fig. 5. A very elegant and abundant coral {Caryophyllia annularis, of Parkinson), in the bed 

 termed " Coral Rag," of the oolite of Wiltshire, Berkshire, &c. Large conglo- 

 merated masses of this branched species form a considerable proportion of the fossil 

 coral-reef which traverses some parts of the oolite : and when this bed is worked 

 for road materials, blocks of this coral, more or less changed into calcareous spar, 

 may be seen lying on the way-side. Near Faringdon, in Berkshire, a quarry in 

 the Coral-rag has yielded many beautiful examples. 



Fig. 7. Called " Spider-stone," by Mr. Parkinson. It is a species of Astrea : d, is an enlarged 

 view of one of the polype-cells. 



Fig. 8. A beautiful fossil coral, from Transylvania (apparently a species of Lithostrotion ?). 



Fig. 9. The specimen figured is from the mountain limestone of the Mendip Hills. (It is the 

 Michelinia tenuisepta, of Phillips ; Manon favosum, of Goldfuss ?) It is described by 

 Mr. Parkinson as " bearing somewhat of a honeycomb appearance." 



