Bourgueticrinus rugosus. The diameter of the specimen figured is 3/4 of an inch, the depth of each plate 3/16. The surface of attachment is covered with very fine mamillæ, in rays of seven in number; a smaller specimen in possession of the author measures 3/8 of an inch in diameter and 1/8 in depth. The serpula represented in Plate III. fig. 3 varies in its irregular growth from the specimens figured on the same plate. This character perhaps can scarcely be regarded as a specific difference; both V. elongata and the serpula under consideration have the same thickness of the calcareous tube. The former occurs only at Speeton and the latter at Hunstanton; in order to distinguish the two, the title "irregularis" may be applied to the latter as a variety. Serpula triserrata, a species found on a specimen of Ammonites complanatus, is distinguishable by its three serrate longitudinal ridges. A similar form occurs on ostreæ from the Kimmeridge clay of West Norfolk. Terebratula semiglobosa is common at Speeton, but very rare at Hunstanton. T. biplicata is very common at Hunstanton, but is not known at Speeton. Inoceramus læviusculus, Bean, a large smooth species something like I. Cuvieri. The Ammonites alternatus of Woodward is now lost; it was probably a variety of A. serratus, Park. Belemnites minimus is sometimes two inches long in the Hunstanton Cliff. The vertebra of Polyptychodon would be, if perfect, about six inches in diameter and three in thickness. The small specimen shown in Plate II. fig. 9 evidently belongs to the Turbinolian family of corals, and possibly to the genus Trochocyathus instituted by Messrs. Milne-Edwards and J. Haime, in 1848. The specimens as yet obtained are not sufficiently numerous nor perfect for a rigid comparison with other forms, or to admit of a sufficiently detailed description should the species prove to be new. The constricted form of growth is very common in the Parasmilia of the Upper Chalk, and has no specific value. The characteristic fossils of the Red Chalk at Speeton are Terebratula semiglobosa, Belemnites minimus, and Vermicularia elongata; and at Hunstanton, Terebratula biplicata, Belemnites minimus, and Spongia paradoxica.