Fig. 8. An Echinite (Spatangites (Nucleolites) brissoides ovalis, of Parkinson). Locality unknown.
Fig. 9. A beautiful specimen of a large heart-shaped Echinite of a recent species (Spatangus purpureus), from a modern tertiary deposit, Malta.
Fig. 10. An Echinite (Echinodiscus (Clypeaster) laganum, of Parkinson), from a tertiary deposit, Verona.
Fig. 11. This Is a very abundant Spatangus or heart-shaped echinite, (Spatangus cor marinum, of Parkinson; Cor testudinarium, of Goldfuss; Micraster cor anguinum, of Agassiz,) in the chalk of Kent, and some parts of Sussex. Siliceous casts, forming cordiform flints, with deep imprints of the pentapetalous rays on the vertex, are common among the stones of the ploughed fields of the Downs.
Fig. 12. A Spatangite, (Spatangus (Micraster, of Agassiz) lacunosus, of Parkinson), from tertiary strata, Malta,
Plate LVI.