EXPLANATION OF THE PLATES. 



/Yo-5. 26. 27. have the shape of tamarind stones, and a kind of case or epidermis, as if 



formed by secretion, round their margin. 

 Fig. 28. in shape resembles a kidney bean. 



Fio-. 29. seems to be a fragment of a broken sphere, and in shape resembles fig. 30. 

 Fi"-. 30. is a concretion of phosphate of lime from a human gall-bladder. 

 Figs. 3\. to 41. inclusive, are small Coprolites of various shapes from the bone bed 



near the bottom of the carboniferous limestone at Clifton near Bristol. 



PLATE XXXL 



Figs. 1. to 7. inclusive. Specimens of lulo-eido-coprus from the chalk and chalk- 

 marl of Sussex ; the wavy lines and corrugations on their surface are apparently 

 derived from the intestines in which they were formed. See the surface of the 

 recent intestines, figs. 20. & 21. 



Figs. 9. 10. 11. lulo-eido-copri, from Maestriclit, in the collection of Col. Iloulton 

 of Farley Castle. 



Figs. 2. So 11. at their larger extremity show the edge of the thin winding plate, the 

 coils of which around itself make up the body of the Coprolite. 



Fig. 6. exhibits scales of fishes imbedded in the substance, and parallel to the surface 

 of the lamina of digested bone. See a similar parallelism in the scales and lamina 

 of fig. 12. Plate XXVIH. 



Fig. 8. Longitudinal section offig. 7. showing the conical arrangement of the interior, 

 like that at Plate XXVIIL figs. 10. II. but inverted. 



Fig. 11^ Coprolite figured as an unknown fruit in Burtins' Ort/ciogr. tie Bruxelles, 

 PI. V. G. 



Fig. 12. Amia-coprus from the chalk near Lewes, found by Mr. Mantell within the 

 skeleton of an Amia : p. 234. 



Fig. 13. Coprolite from the chalk at Lewes ; not yet ascertained from what animal. 



Fig. 14. Coprolite purchased by Dr. Buckland in a collection of fossils from the Isle 

 of Sheppey. 



Fig. 15. Coprolite from the freshwater coal shale at Fuveau near Aix, in the collec- 

 tion of Mr. Murchison. 



Fig. 16. Coprolite from the freshwater marl containing insects above the gypsum at 

 Aix, in the collection of Mr. Murchison. 



Fig. 17. Coprolite from the green sand of Wiltshire. 



Fig. 18. Coprolite, from the sandstone of Tilgate Forest, in the collection of Mr. 

 Mantell. See fish-scale on its surface. 



Figs. 19. 20. 21. Intestines of Dog-Fish injected with Roman cement, showing spiral 

 . coils ; and in figs. 20. 21. exhibiting vascular structure, as on the surface of figs. 1. 

 4.5.9. II. 



Fig. 22. Intestine of a Skate injected with Roman cement ; the external coil marking 

 the spiral fold of its interior. 



