TAB. LVII. 
CORALS OF THE SILURIAN FORMATION. 
PaLzocycLus PporPita (p. 246). 
Fig. 1. Upper surface of a specimen found at Dudley; Collection of Mr. Fletcher ; 
natural size. 
la. Lower surface of another specimen found at Dudley; Collection of Mr. Fletcher ; 
natural size. 
14. Side view of the specimen figured in | ; natural size. 
le. Upper surface of the specimen figured in 1 ; magnified. 
PaLHOcYCcLus PRHACUTUS (p. 247). 
Fig. 1. Upper surface of a specimen found at Marloes Bay, and belonging to the 
Collection of the Geological Society of London; natural size. 
2u. Lower surface of the same; natural size. 
24. Side view of the same; natural size. 
2c. A part of the upper surface, magnified. 
Panaocycius FiLercuEri (p. 248). 
Fig. 3. Side view of a young specimen ; natural size. 
3a. Upper surface of the same ; natural size. 
36. Upper surface of an adult specimen ; natural size. 
3c. Side view of a young elongate specimen. 
3d. Side view of an adult specimen; natural size. 
3e. A specimen bearing two young ones ; natural size. 
3f. Part of the upper surface of 34, magnified. 
All these specimens were found at Dudley, and belong to the Collection of 
Mr. Fletcher. 
PaLmocycLus ruGosus (p. 248). 
Fig. 4. Side view of a small specimen ; natural size. 
4a. Upper surface of another specimen ; natural size. 
4b, 4c. Side views of two elongate ones ; natural size. 
4d. Part of the upper surface of 4a, magnified. 
These various specimens were found at Dudley, and belong to the Collection 
of Mr. Fletcher. 
